Stock Markets May 12, 2026 11:30 AM

Istanbul shares slide as BIST 100 falls 2.34%

Telecoms, Leasing & Factoring and Banking sectors lead declines while a handful of stocks post gains and energy name reaches a record high

By Marcus Reed

Turkey's benchmark BIST 100 closed down 2.34% as losses clustered in the Telecoms, Leasing & Factoring and Banking sectors. While most stocks fell, selected names in logistics, retail and energy posted gains, and Margun Enerji reached an all-time high. Commodity and currency moves also accompanied the session.

Istanbul shares slide as BIST 100 falls 2.34%

Key Points

  • BIST 100 closed down 2.34% as losses were concentrated in Telecoms, Leasing & Factoring and Banking sectors.
  • Top gainers included Pasifik Eurasia Lojistik (IS:PASEU), Hektas Ticaret (IS:HEKTS), and Margun Enerji (IS:MAGEN); Margun Enerji reached an all-time high at 67.40.
  • Major losers included Borusan Birlesik Boru (IS:BRSAN), Kiler Holding (IS:KLRHO), and Can2 Termik (IS:CANTE); market breadth was negative with 429 decliners versus 181 advancers.

Market close: Turkey's main equity gauge finished lower on Tuesday, with the BIST 100 slipping 2.34% at the end of trading in Istanbul. Broad declines were led by stocks in the Telecoms, Leasing & Factoring and Banking sectors.

Winners: Among constituents that advanced, Pasifik Eurasia Lojistik Dis Ticaret AS (IS:PASEU) outperformed the session, rising 6.89% - a gain of 7.80 points - to close at 121.00. Hektas Ticaret TAS (IS:HEKTS) climbed 6.15%, up 0.28 points to finish at 4.83. Energy company Margun Enerji Uretim Sanayi ve Ticaret AS (IS:MAGEN) added 4.98%, a 3.20-point increase that put its late trade price at 67.40.

Laggers: On the downside, Borusan Birlesik Boru Fabrikalari Sanayi Ve Ticaret AS (IS:BRSAN) led losses, falling 9.56% or 57.00 points to close at 539.50. Kiler Holding AS (IS:KLRHO) declined 9.32%, down 11.30 points to 109.90, and Can2 Termik AS (IS:CANTE) dropped 8.90%, a 0.17-point fall to 1.74 at the close.

Breadth and records: Decliners outnumbered advancers on the Istanbul Stock Exchange, with 429 stocks down versus 181 advancing; 9 issues finished unchanged. Margun Enerji Uretim Sanayi ve Ticaret AS (IS:MAGEN) reached an all-time high during the session, finishing up 4.98% at 67.40.

Commodities and FX: Precious metals and energy both moved noticeably. Gold Futures for June delivery fell 1.31%, down $62.13 to $4,666.57 a troy ounce. Crude oil for June delivery rose 3.82% or $3.75 to $101.82 a barrel, while the July Brent contract gained 3.68% or $3.84 to trade at $108.05 a barrel. In currency markets, USD/TRY edged up 0.14% to 45.40 and EUR/TRY moved lower by 0.37% to 53.29. The US Dollar Index Futures was higher as well, up 0.51% at 98.32.


Implications: The session showed sector-led pressure on the benchmark, with Telecoms, Leasing & Factoring and Banking names contributing heavily to the decline. At the same time, selected logistics, retail and energy issuers posted meaningful gains.

What to watch next: Market participants may monitor whether the sectoral weakness seen today persists and how commodity and currency moves correlate with equity performance in coming sessions.

Risks

  • Continued sector-specific selloffs in Telecoms, Leasing & Factoring and Banking could exert further downward pressure on the benchmark - impacts most directly the financial and leasing-related stocks.
  • Volatility in commodity prices, notably crude oil and gold, may influence energy-related and broader market sentiment - affecting energy producers and resource-linked equities.
  • Exchange rate movements in USD/TRY and EUR/TRY may introduce FX-related pressures on companies with currency exposure - relevant for importers, exporters and firms with foreign-currency debt.

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