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Borsa Istanbul

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uuid000b4bh

Namestring
Borsa Istanbul
Legal namestring
Borsa İstanbul A.Ş.
Company typeenum
Private
Founded yearint
2013
Descriptiontext

Borsa Istanbul A.Ş. operates as Turkey's sole securities exchange under Capital Markets Law No. 6362, supervised by the Capital Markets Board (SPK). The entity was formed in 2013 through the merger of the Istanbul Stock Exchange (founded 1985), the Istanbul Gold Exchange, and the Derivatives Exchange of Turkey, though its lineage traces to the Galata Borsası of 1854 and the Dersaadet Tahvilat Borsası of 1866. It operates multi-asset markets spanning equities (Star, Main, and sub-markets), debt securities, derivatives (VIOP), precious metals and diamonds, swaps, and money markets, plus a dedicated Structured Products and Funds Market. The exchange serves individual investors, institutional investors and brokerage houses, listed companies seeking capital, and foreign investors — with UK HMRC recognized exchange status enabling cross-border access.

The exchange is built on BISTECH, its proprietary trading platform launched in 2015, which supports connectivity protocols, application interfaces (CONNECT & VERDA), co-location services in the primary data center, and a London Equinix LD5 point of presence for international data dissemination. It maintains the BIST and BIST-KYD index families (including BIST 100, BIST 30, sector, sustainability, participation/Shariah-compliant, and strategy indices), a Public Disclosure Platform (KAP), and a nationwide footprint of 81 provincial contact points. Borsa Istanbul holds membership in the World Federation of Exchanges and demonstrates alignment with IOSCO principles. Revenue is generated through transaction fees across its multiple market segments, listing and registration fees, co-location services, market data licensing, and index licensing — though specific fee schedules and revenue figures are not disclosed in the source material. The exchange is structured as a private joint-stock company (not publicly listed on its own market) and is led by CEO Korkmaz Ergun.

Short descriptiontext

Borsa Istanbul is Turkey's sole statutory securities exchange, operating multi-asset markets — equities, debt, derivatives, precious metals, and swaps — on its proprietary BISTECH platform, serving retail investors, brokerage firms, listed companies, and foreign investors.

Operating statusenum
Operating
Ownership categoryenum
Headcount rangeband
501–1,000
akta.pro rankint
HeadquartersSariyer
HQ citystring
Sariyer
Markets served

Serves global market

Offices1 record

Each record includes

City, Country, Type, Description, Source

Keyword5 values
securities exchange operations, equity trading platform, derivatives market services, debt securities trading, market data dissemination
Industry3 codes
1Equity Index Futures & Options Exchanges
CodeFSAFABAAPrimaryYes
2Equity Index & Futures Derivatives
CodeFSACADAFPrimaryNo
3Algorithmic Trading & Execution Platforms
CodeFSAFANANPrimaryNo
NAICS code3 codes
  • Securities and Commodity Exchanges5232
  • Securities and Commodity Contracts Intermediation and Brokerage5231
  • Financial Transactions Processing, Reserve, and Clearinghouse Activities522320
SIC code2 codes
  • Security & Commodity Brokers, Dealers, Exchanges & Services6200
  • Security Brokers, Dealers & Flotation Companies6211
Product category
Securities Exchange Operations
Marketing channels5 records

Each record includes

Title, Type, Stage, Description, Source

Distribution channels3 records

Each record includes

Title, Type, Scope, Target buyer, Description, Source

Cost components5 values
Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales
GTM typeB2B
B2B
Offering typeServices
Services
Brand1 of 3 records shown
1BISTECH
Description

Proprietary trading technology platform developed by Borsa İstanbul for market operations and connectivity.

borsaistanbul.com
+2 more records
Core offering1 text field

Borsa Istanbul A.Ş. operates as Turkey's sole securities exchange, providing a multi-asset regulated trading platform for equities, debt securities, derivatives (futures and options via VIOP), precious metals, diamonds, swaps, and money market instruments. The exchange powers trading, clearing routing, index calculation, market data dissemination, and co-location services through its proprietary BISTECH technology infrastructure, serving listed companies, brokerage firm members, and domestic and foreign investors.

Differentiator
Functional benefit
Problem solved
Product overview1 text field

Borsa Istanbul A.Ş. operates as Turkey's primary securities exchange, offering a multi-market platform architecture comprising Equity Market (Pay Piyasası), Debt Securities Market (Borçlanma Araçları Piyasası), Derivatives Market VIOP (Vadeli İşlem ve Opsiyon Piyasası), Precious Metals and Diamond Market, Swap Market, and Money Market. The exchange provides comprehensive index services through BIST and BIST-KYD index families, market surveillance and public disclosure platforms, data dissemination services via BISTECH technology infrastructure including co-location facilities and the London Equinix LD5 point of presence, and financial literacy education. Participation finance (Islamic finance) products are offered alongside conventional markets, serving both retail and institutional investors through member brokerage firms.

Product and service13 records
1Pay Piyasası (Equity Market)
CategoryEquities Trading
2Borçlanma Araçları Piyasası (Debt Securities Market)
CategoryFixed Income Trading
3Vadeli İşlem ve Opsiyon Piyasası - VIOP (Derivatives Market)
CategoryDerivatives Trading
4Kıymetli Madenler ve Kıymetli Taşlar Piyasası (Precious Metals and Diamond Market)
CategoryCommodities Trading
5Swap Piyasası (Swap Market)
CategoryDerivatives Trading
6Para Piyasası (Money Market)
CategoryMoney Markets
7BISTECH Technology Platform
CategoryTrading Technology Infrastructure
8BIST Pay Endeksleri (BIST Stock Indices)
CategoryIndex Services
9BIST-KYD Endeksleri
CategoryIndex Services
10Veri Dağıtımı (Data Dissemination)
CategoryMarket Data Services
11Kolokasyon (Co-location Services)
CategoryTechnology Services
12Brokerage House Warrants - June 2026
CategoryStructured Products
13Brokerage House Warrants - January 2026
CategoryStructured Products
Partnership5 partners
Strategic tierCoreTypeStrategic or Co-development PartnerAnnounced on2026-05-13
Description

Memorandum of understanding signed between Borsa Istanbul and Astana International Financial Centre to strengthen digital trading cooperation. The partnership supports Kazakhstan-Türkiye trade target of $15 billion and cooperation in digital technologies between the two countries.

Strategic tierCoreTypeOthers
Description

Takas İstanbul serves as the central clearing counterparty for Borsa Istanbul markets, providing clearing, settlement, and risk management services. Listed as a key infrastructure partner on the exchange's official website.

3Merkezi Kayıt İstanbul (MKK)
Strategic tierCoreTypeOthers
Description

Merkezi Kayıt İstanbul operates as the Central Securities Depository for Turkish capital markets, maintaining investor records and securities accounts. Key infrastructure partner for Borsa Istanbul operations.

borsaistanbul.com
Strategic tierCoreTypeOthers
Description

Borsa Istanbul operates under the authorization and supervision of the Capital Markets Board (Sermaye Piyasası Kurulu - SPK) pursuant to Capital Markets Law No. 6362.

Strategic tierCoreTypeOthers
Description

Borsa Istanbul holds international membership in the World Federation of Exchanges, participating in global exchange industry standards, data sharing, and collaborative initiatives. Received WFE Technology Cooperation Initiative Award.

Expansion highlight5 records

Each record includes

Type, Description

Peers10 records
TypeDirect peer
Description

Sole national securities exchange of an MENA/G20-emerging economy, operating equities, debt, and derivatives markets under a single regulator-driven ecosystem — closely comparable in mandate, scale and regulatory monopoly structure to Borsa Istanbul.

TypeDirect peer
Description

Pakistan's demutualised national exchange with equities, debt, derivatives, and Islamic finance product suites, serving a similarly sized emerging-market economy — direct comparable on multi-asset single-venue operating model.

TypeDirect peer
Description

Operator of Romania's primary equities, debt, and derivatives markets with an emerging-economy profile and similar post-EU regulatory framework — comparable on integrated multi-asset trading and listed-companies segment.

TypeDirect peer
Description

Greek national exchange operating equities, debt, and derivatives with a comparable emerging-European economies scale; closely comparable in revenue mix (trading, listings, data) and regulatory supervision model.

TypeDirect peer
Description

Main regional benchmark exchange (now part of Saudi Tadawul Group) operating equities, derivatives, and ETFs with a single-market focus on a large oil-rich economy — comparable in monopoly status and rapidly scaling product suite.

TypeDirect peer
Description

Israel's sole exchange offering equities, corporate bonds, government bonds, derivatives, and structured products on a single technology platform — comparable in single-jurisdiction monopoly and integrated multi-market architecture.

TypeDirect peer
Description

Africa's largest multi-asset exchange operating equities, bonds, derivatives, commodity and interest-rate markets with diverse index products — comparable in operating-model breadth and emerging-market positioning.

TypeDirect peer
Description

Vietnam's primary exchange serving a high-growth emerging economy with concentrated retail flows and rapid IPO pipeline expansion — comparable on emerging-market equity-led volume growth and regulatory-monopoly structure.

TypeDirect peer
Description

Central Asian multi-asset exchange (equities, bonds, derivatives, FX, repo) and existing BIST partner via the 2026 AIFC digital-trading MOU — direct comparable on regional footprint and multi-asset venue model.

TypeBroad incumbent
Description

Russia's universal exchange combining equities, bonds, derivatives, money markets, FX, and precious metals on a single platform — closely comparable on integrated multi-asset architecture and emerging-market scale.

Market position
Strengths5 records

Each record includes

Headline, Details, Source

Weaknesses5 records

Each record includes

Headline, Details, Source

Competitive moat6 records

Each record includes

Type, Details

Key risks5 records

Each record includes

Headline, Details, Source

Key highlights7 records

Each record includes

Headline, Details, Source

Customer concentration

Classification, Details

Segment4 records

Each record includes

Title, Type, Primary, Description, Pain point addressed, Use case, Source

Ideal customer profile3 records

Each record includes

Profile, Firmographic size, Sales motion, Sales cycle length, Buying structure, Purchase trigger, Buyer persona, Geography, Industry vertical, Primary use case, Description, Pain points, Evidence proof points, Target buyer

Technology focused
Yes
API detail
Has APIbool
No

Docs URL, Description

AI maturity
App detail

Has app

Feature4 records

Each record includes

Title, Differentiator, Description, Source

Core technology
Revenue estimate
Valuation estimate
Number of profiles
Profiles1 record

Each record includes

Name, Designation, Designation category, Overview, Profile commentary, Source

No data
Compliance2 records

Each record includes

Name, Class, Description

Funding overview

Funding stage, Last funding date, Total funding USD

Funding rounds

Each record includes

Round, Amount USD, Date, Pre money valuation, Total investors, Investors, News

Investors

Each record includes

Name, Type, Date of entry, Rounds participated, Website

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Each record includes

Name, Acquisition type, Announced date, Completed date, Status, Website, News

Investment

Each record includes

Name, Round, Announced date, Lead investor, Website, News

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Borsa Istanbul

Securities Exchange Operationsborsaistanbul.com

Borsa Istanbul is Turkey's sole statutory securities exchange, operating multi-asset markets — equities, debt, derivatives, precious metals, and swaps — on its proprietary BISTECH platform, serving retail investors, brokerage firms, listed companies, and foreign investors.

What Borsa Istanbul does

Borsa Istanbul A.Ş. operates as Turkey's sole securities exchange under Capital Markets Law No. 6362, supervised by the Capital Markets Board (SPK). The entity was formed in 2013 through the merger of the Istanbul Stock Exchange (founded 1985), the Istanbul Gold Exchange, and the Derivatives Exchange of Turkey, though its lineage traces to the Galata Borsası of 1854 and the Dersaadet Tahvilat Borsası of 1866. It operates multi-asset markets spanning equities (Star, Main, and sub-markets), debt securities, derivatives (VIOP), precious metals and diamonds, swaps, and money markets, plus a dedicated Structured Products and Funds Market. The exchange serves individual investors, institutional investors and brokerage houses, listed companies seeking capital, and foreign investors — with UK HMRC recognized exchange status enabling cross-border access.

The exchange is built on BISTECH, its proprietary trading platform launched in 2015, which supports connectivity protocols, application interfaces (CONNECT & VERDA), co-location services in the primary data center, and a London Equinix LD5 point of presence for international data dissemination. It maintains the BIST and BIST-KYD index families (including BIST 100, BIST 30, sector, sustainability, participation/Shariah-compliant, and strategy indices), a Public Disclosure Platform (KAP), and a nationwide footprint of 81 provincial contact points. Borsa Istanbul holds membership in the World Federation of Exchanges and demonstrates alignment with IOSCO principles. Revenue is generated through transaction fees across its multiple market segments, listing and registration fees, co-location services, market data licensing, and index licensing — though specific fee schedules and revenue figures are not disclosed in the source material. The exchange is structured as a private joint-stock company (not publicly listed on its own market) and is led by CEO Korkmaz Ergun.

Borsa Istanbul firmographics

Firmographics
Name
Borsa Istanbul
Legal name
Borsa İstanbul A.Ş.
Website
https://borsaistanbul.com
Company type
Private
Founded year
2013
Operating status
Operating
Headcount range
501–1,000 employees
Short description
Borsa Istanbul is Turkey's sole statutory securities exchange, operating multi-asset markets — equities, debt, derivatives, precious metals, and swaps — on its proprietary BISTECH platform, serving retail investors, brokerage firms, listed companies, and foreign investors.
Ownership category
akta.pro rank

Borsa Istanbul industry classification

Industry
Product category
Securities Exchange Operations
NAICS
Securities and Commodity Exchanges (5232), Securities and Commodity Contracts Intermediation and Brokerage (5231), Financial Transactions Processing, Reserve, and Clearinghouse Activities (522320)
SIC
Security & Commodity Brokers, Dealers, Exchanges & Services (6200), Security Brokers, Dealers & Flotation Companies (6211)
akta.pro primary industry
Equity Index Futures & Options Exchanges (FSAFABAA)
akta.pro secondary industries
Equity Index & Futures Derivatives (FSACADAF), Algorithmic Trading & Execution Platforms (FSAFANAN)

Keywords

  • Securities exchange operations
  • Equity trading platform
  • Derivatives market services
  • Debt securities trading
  • Market data dissemination

Where Borsa Istanbul is headquartered

Location

Headquarters

HQ city
Sariyer

Offices1 record

Markets served

Borsa Istanbul business model

Business model
GTM type
B2B
Offering type
Services
Cost components
Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales

Distribution channels3 records

Marketing channels5 records

Borsa Istanbul product offering

Product offering

Core offering

Borsa Istanbul A.Ş. operates as Turkey's sole securities exchange, providing a multi-asset regulated trading platform for equities, debt securities, derivatives (futures and options via VIOP), precious metals, diamonds, swaps, and money market instruments. The exchange powers trading, clearing routing, index calculation, market data dissemination, and co-location services through its proprietary BISTECH technology infrastructure, serving listed companies, brokerage firm members, and domestic and foreign investors.

Product overview

Borsa Istanbul A.Ş. operates as Turkey's primary securities exchange, offering a multi-market platform architecture comprising Equity Market (Pay Piyasası), Debt Securities Market (Borçlanma Araçları Piyasası), Derivatives Market VIOP (Vadeli İşlem ve Opsiyon Piyasası), Precious Metals and Diamond Market, Swap Market, and Money Market. The exchange provides comprehensive index services through BIST and BIST-KYD index families, market surveillance and public disclosure platforms, data dissemination services via BISTECH technology infrastructure including co-location facilities and the London Equinix LD5 point of presence, and financial literacy education. Participation finance (Islamic finance) products are offered alongside conventional markets, serving both retail and institutional investors through member brokerage firms.

Differentiator

Problem solved

Functional benefit

Brands

  • BISTECH: Proprietary trading technology platform developed by Borsa İstanbul for market operations and connectivity.
  • VIOP
  • BIST 100

Products and services

  • Pay Piyasası (Equity Market)
  • Borçlanma Araçları Piyasası (Debt Securities Market)
  • Vadeli İşlem ve Opsiyon Piyasası - VIOP (Derivatives Market)
  • Kıymetli Madenler ve Kıymetli Taşlar Piyasası (Precious Metals and Diamond Market)
  • Swap Piyasası (Swap Market)
  • Para Piyasası (Money Market)
  • BISTECH Technology Platform
  • BIST Pay Endeksleri (BIST Stock Indices)
  • BIST-KYD Endeksleri
  • Veri Dağıtımı (Data Dissemination)
  • Kolokasyon (Co-location Services)
  • Brokerage House Warrants - June 2026
  • Brokerage House Warrants - January 2026

Companies that use Borsa Istanbul

Customer profile

Segments4 records

Ideal customer profiles3 records

Borsa Istanbul technology and API

Technology

Technology focussed Yes

API detail

Has API
No
API docs
API detail

Core technology

AI maturity

App detail

Feature4 records

Borsa Istanbul partnerships and signals

Strategic signal

Partnerships

Five partnerships are on record, tiered core.

  • Astana International Financial Centre (AIFC)coreStrategic or Co-development Partner · 13 May 2026Memorandum of understanding signed between Borsa Istanbul and Astana International Financial Centre to strengthen digital trading cooperation. The partnership supports Kazakhstan-Türkiye trade target of $15 billion and cooperation in digital technologies between the two countries.
  • Takas İstanbul (Takasbank)coreOthersTakas İstanbul serves as the central clearing counterparty for Borsa Istanbul markets, providing clearing, settlement, and risk management services. Listed as a key infrastructure partner on the exchange's official website.
  • Merkezi Kayıt İstanbul (MKK)coreOthersMerkezi Kayıt İstanbul operates as the Central Securities Depository for Turkish capital markets, maintaining investor records and securities accounts. Key infrastructure partner for Borsa Istanbul operations.
  • Capital Markets Board of Turkey (SPK)coreOthersBorsa Istanbul operates under the authorization and supervision of the Capital Markets Board (Sermaye Piyasası Kurulu - SPK) pursuant to Capital Markets Law No. 6362.
  • World Federation of Exchanges (WFE)coreOthersBorsa Istanbul holds international membership in the World Federation of Exchanges, participating in global exchange industry standards, data sharing, and collaborative initiatives. Received WFE Technology Cooperation Initiative Award.

Expansion highlights5 records

Borsa Istanbul competitors and assessment

Company assessment

Direct peers

  • Egyptian Exchange (EGX): Sole national securities exchange of an MENA/G20-emerging economy, operating equities, debt, and derivatives markets under a single regulator-driven ecosystem — closely comparable in mandate, scale and regulatory monopoly structure to Borsa Istanbul.
  • Pakistan Stock Exchange (PSX): Pakistan's demutualised national exchange with equities, debt, derivatives, and Islamic finance product suites, serving a similarly sized emerging-market economy — direct comparable on multi-asset single-venue operating model.
  • Bucharest Stock Exchange (BVB): Operator of Romania's primary equities, debt, and derivatives markets with an emerging-economy profile and similar post-EU regulatory framework — comparable on integrated multi-asset trading and listed-companies segment.
  • Athens Stock Exchange (ATHEX): Greek national exchange operating equities, debt, and derivatives with a comparable emerging-European economies scale; closely comparable in revenue mix (trading, listings, data) and regulatory supervision model.
  • Saudi Exchange (Tadawul): Main regional benchmark exchange (now part of Saudi Tadawul Group) operating equities, derivatives, and ETFs with a single-market focus on a large oil-rich economy — comparable in monopoly status and rapidly scaling product suite.
  • Tel Aviv Stock Exchange (TASE): Israel's sole exchange offering equities, corporate bonds, government bonds, derivatives, and structured products on a single technology platform — comparable in single-jurisdiction monopoly and integrated multi-market architecture.
  • Johannesburg Stock Exchange (JSE): Africa's largest multi-asset exchange operating equities, bonds, derivatives, commodity and interest-rate markets with diverse index products — comparable in operating-model breadth and emerging-market positioning.
  • Ho Chi Minh Stock Exchange (HOSE): Vietnam's primary exchange serving a high-growth emerging economy with concentrated retail flows and rapid IPO pipeline expansion — comparable on emerging-market equity-led volume growth and regulatory-monopoly structure.
  • Kazakhstan Stock Exchange (KASE): Central Asian multi-asset exchange (equities, bonds, derivatives, FX, repo) and existing BIST partner via the 2026 AIFC digital-trading MOU — direct comparable on regional footprint and multi-asset venue model.

Broad incumbents

  • Moscow Exchange (MOEX): Russia's universal exchange combining equities, bonds, derivatives, money markets, FX, and precious metals on a single platform — closely comparable on integrated multi-asset architecture and emerging-market scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

Borsa Istanbul social profiles

Digital presence

Borsa Istanbul compliance and trust

Trust signal

Compliance2 records

Borsa Istanbul financial estimates

Financial estimate

Revenue estimate

Valuation estimate

Borsa Istanbul leadership team

Management profile

Number of profiles

Profiles1 record

Borsa Istanbul funding detail

Funding detail

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

Borsa Istanbul M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Borsa Istanbul

What does Borsa Istanbul do?

Borsa Istanbul A.Ş. operates as Turkey's sole securities exchange, providing a multi-asset regulated trading platform for equities, debt securities, derivatives (futures and options via VIOP), precious metals, diamonds, swaps, and money market instruments. The exchange powers trading, clearing routing, index calculation, market data dissemination, and co-location services through its proprietary BISTECH technology infrastructure, serving listed companies, brokerage firm members, and domestic and foreign investors.

Is Borsa Istanbul a public or private company?

Borsa Istanbul is a private company. It is classified as unknown and is currently operating.

When was Borsa Istanbul founded?

Borsa Istanbul was founded in 2013. It employs 501 to 1,000 people.

Where is Borsa Istanbul based?

Borsa Istanbul is headquartered in Sariyer.

Who are Borsa Istanbul's main competitors?

Direct peers on record are Egyptian Exchange (EGX), Pakistan Stock Exchange (PSX), Bucharest Stock Exchange (BVB), Athens Stock Exchange (ATHEX), Saudi Exchange (Tadawul), Tel Aviv Stock Exchange (TASE), Johannesburg Stock Exchange (JSE), Ho Chi Minh Stock Exchange (HOSE) and Kazakhstan Stock Exchange (KASE). Moscow Exchange (MOEX) is listed as a broad incumbent.

Does Borsa Istanbul have an API?

No public API is recorded for Borsa Istanbul.

What industry is Borsa Istanbul in?

Borsa Istanbul's product category is Securities Exchange Operations. Its primary akta.pro industry code is FSAFABAA, Equity Index Futures & Options Exchanges, with a secondary code of FSACADAF, Equity Index & Futures Derivatives. Its NAICS code is 5232 and its SIC code is 6200.

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Live signals
BloombergTurkish Stocks Set to Enter Bear Market on Fund TurmoilTurkish stocks are on course to enter a bear market after a fund crisis erased billions from Istanbul-listed firms. The Borsa Istanbul 100 Index fell 1.7% to 12,084 points early Wednesday, down 20% from May highs, putting it into bear territory if it closes at such levels. In dollar terms, the index is already down about 25%.BloombergTurkey Fund Crisis Exposes Small Caps to Deeper Selloff - BloombergTurkey's fund-industry crisis is hitting small caps hardest, with the Borsa Istanbul SME index falling 34% this month versus a 10% drop in the BIST 100. Hundreds of stocks in the broader index also declined sharply, widening the gap between small and large caps.AInvestWhy Armada Gida's Circuit Breakers Are About Liquidity, Not EarningsArmada Gida triggered Borsa Istanbul's circuit breakers three times in September, halting trading. The company's Q2 revenue rose 151% to 4.75 billion lira, and net income more than doubled, but its thin public float amplifies price swings. The risk is that momentum outpaces liquidity, not that the business is failing.The future of tradingIstanbul stock exchange to remove over a quarter of main index, as regulators tackle liquidity crisisBorsa Istanbul will replace over a quarter of its BIST-100 index constituents, effective next month, as regulators address a liquidity crisis triggered by a fund sell-off. Destek Finans and Katilimevim will leave, while Anadolu Grubu and TAB Gida return. New Star Market criteria now assess volatility and equity size.MintStock at Heart of Turkish Fund Crisis Ejected From Top IndexesBorsa Istanbul removed Destek Finans and Katilimevim from its top stock indexes after a crackdown on investment funds. Destek's shares had surged nearly 7,500% from IPO to peak, and funds held about 70 billion lira of Destek stock. The exchange also excluded 27 other stocks from the BIST 100.BloombergDestek Finans Ejected From BIST 30, BIST 100 Indexes in Turkish Fund Crisis - BloombergBorsa Istanbul removed factoring company Destek Finans from its 30 and 100 stock indexes, and also excluded finance company Katilimevim Tasarruf Finansman from the 100-stock index. The exchange announced quarterly changes to its benchmarks, citing Turkey's crackdown on investment funds.AInvestWhat a Turkish Circuit Breaker Says About the Market You Can't TradeObase's shares fell 5% on Borsa Istanbul, triggering a circuit breaker that halted trading and switched to a single-price auction. The halt reflects a broader Turkish fund-liquidity crisis, with two major fund managers defaulting and 130 funds liquidated. MSCI and S&P have set a November 2026 review deadline, which could trigger index-fund outflows.AInvestWhy a Circuit Breaker Halting a Turkish Stock Tells You More About Liquidity Than the BusinessCimbeton's stock halted on Borsa Istanbul because its price crossed the circuit-breaker threshold, not due to bad news. The company reports a net loss of 245 million lira and negative gross margins, with revenue down 37% year-over-year. The halt reflects the stock's illiquidity, not a change in fundamentals.AInvestKLYPV.E Tripped Its Circuit Breaker. Here's What That Says About the Stock Behind ItKalyon Günes Teknolojileri's ordinary shares tripped Borsa Istanbul's circuit breaker on September 16 and again two days later. The company's revenue rose 39% to 8.12 billion lira, but net loss widened 96% to 691 million lira, with the parent providing cash. The circuit breaker is a mechanical pause, not a signal on the stock's direction.AInvestANGEN's Circuit Breaker Is a Liquidity Story, Not a VerdictBorsa Istanbul halted ANGEN stock trading twice in three days using single-price auctions due to liquidity imbalances. The Turkish diagnostics firm, with a ₺1.7B market cap, saw revenue rise 40% to ₺739.6M while net losses widened 43% to ₺312.7M. October earnings will be the key anchor for valuation.