Stock Markets February 27, 2026

Istanbul Shares Slip as BIST 100 Closes 1.16% Lower

Telecoms, holdings and paper sectors weigh on market; mixed moves in commodities and FX accompany the selloff

By Nina Shah
Istanbul Shares Slip as BIST 100 Closes 1.16% Lower

Turkey's benchmark BIST 100 finished the Friday session down 1.16% in Istanbul, led by declines in the Telecoms, Holdings & Investments and Wood, Paper & Printing sectors. Decliners outnumbered advancers by a wide margin as several large-cap names posted double-digit percentage falls, while select small- and mid-cap stocks recorded gains. Commodities and currency markets saw notable moves, with gold, crude and Brent rising and the Turkish lira weakening slightly against major currencies.

Key Points

  • BIST 100 closed down 1.16% in Istanbul.
  • Telecoms, Holdings & Investments and Wood, Paper & Printing sectors led losses; market breadth saw 420 decliners versus 182 advancers.
  • Gold and crude rose while USD/TRY and EUR/TRY ticked higher; US Dollar Index Futures slipped.

Turkey's main equity gauge closed lower on Friday, with the BIST 100 falling 1.16% at the end of trading in Istanbul. Sector losses were concentrated in Telecoms, Holdings & Investments and Wood, Paper & Printing, and the session registered many more decliners than advancers.

The session's top performers on the BIST 100 included Pasifik Teknoloji A.S. (IS:PATEK), which gained 6.11% or 1.11 points to finish at 19.29. Altinay Savunma Teknolojileri AS (IS:ALTNY) rose 5.55% or 0.88 points to close at 16.75, while Baticim Bati Anadolu Cimento Sanayi AS (IS:BTCIM) advanced 4.24% or 0.22 points to end the day at 5.41.

On the downside, Borusan Birlesik Boru Fabrikalari Sanayi Ve Ticaret AS (IS:BRSAN) led losses with a 10.00% drop - down 72.00 points to 648.00 at the close. Kiler Holding AS (IS:KLRHO) slipped 9.95% or 34.25 points to finish at 310.00, and Borusan Yatirim ve Pazarlama AS (IS:BRYAT) fell 8.86% or 222.50 points to end at 2,290.00.

Market breadth on the Istanbul Stock Exchange was skewed toward falling names: 420 stocks declined versus 182 that advanced, while 13 shares ended unchanged.

Commodities traded with upward momentum during the session. Gold Futures for April delivery rose 1.08% or 56.14 to $5,250.34 a troy ounce. In energy markets, crude oil for April delivery climbed 2.64% or 1.72 to $66.93 a barrel, and the May Brent oil contract increased 2.74% or 1.94 to trade at $72.78 a barrel.

Foreign exchange moves accompanied the market action. The USD/TRY rate rose 0.14% to 43.96, while EUR/TRY increased 0.06% to 51.95. The US Dollar Index Futures was down 0.08% at 97.66.


Summary

The BIST 100 closed lower by 1.16% as losses in key sectors - notably Telecoms, Holdings & Investments and Wood, Paper & Printing - pushed the index down. A small group of stocks outperformed while a larger number of names recorded declines. Commodities and FX markets showed gains for gold and oil, and modest depreciation in the lira versus the dollar and euro.

Key points

  • Benchmark performance - BIST 100 fell 1.16% at the close in Istanbul.
  • Sector impact - Telecoms, Holdings & Investments and Wood, Paper & Printing led declines; these sectors were material contributors to the market drop.
  • Broader market breadth - 420 declining stocks versus 182 advancers, with 13 unchanged.

Risks and uncertainties

  • Concentrated sector weakness - Continued pressure in Telecoms, Holdings & Investments and Wood, Paper & Printing could sustain downside for the index.
  • Market breadth imbalance - A large number of decliners relative to advancers suggests potential volatility and uneven liquidity across sectors.
  • Commodity and FX moves - Rising gold and oil prices alongside modest lira weakening could affect input costs and currency-sensitive sectors.

Risks

  • Sustained weakness in Telecoms, Holdings & Investments and Wood, Paper & Printing could prolong index declines.
  • Imbalanced market breadth (420 decliners vs 182 advancers) raises potential for increased volatility and uneven sector liquidity.
  • Movements in commodities and FX may create cost and currency risks for Turkish corporates, particularly those with foreign currency exposures.

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