Stock Markets August 20, 2026 11:30 AM

Istanbul market slips as BIST 100 closes down 0.43%

Tech, textile and banking stocks weigh on the index while select names post strong gains and commodities push higher

By Caleb Monroe
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Turkey's benchmark index ended Thursday lower, with the BIST 100 retreating 0.43% as losses in Information Technology, Textile & Leather and Banking names outnumbered the winners. Several individual stocks posted double-digit percentage moves in both directions amid gains in gold and crude oil and modest FX shifts.

Istanbul market slips as BIST 100 closes down 0.43%
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Key Points

  • BIST 100 closed down 0.43% as Information Technology, Textile & Leather and Banking sectors led losses.
  • Top gainers included ALTNY, PASEU (which hit an all-time high), and GENIL; major decliners included ODINE, SARKY, and ULKER.
  • Commodities climbed with December gold up 0.92% and October crude and Brent rising more than 2% and 2% respectively; USD/TRY and EUR/TRY posted small increases.

Turkey's equity market finished lower on Thursday, with the BIST 100 closing down 0.43% in Istanbul as declines in the Information Technology, Textile & Leather and Banking sectors outpaced advances elsewhere.

Market movers

The session's top performers on the BIST 100 included Altinay Savunma Teknolojileri AS (IS:ALTNY), which climbed 8.82% - gaining 1.51 points to finish at 18.63. Pasifik Eurasia Lojistik Dis Ticaret AS (IS:PASEU) rose 8.76% - up 16.30 points to close at 202.30, and Gen Ilac ve Saglik Urunleri Sanayi ve Ticaret AS (IS:GENIL) increased 8.53% - adding 0.95 points to end at 12.09.

  • Best performers:
    • Altinay Savunma Teknolojileri AS (IS:ALTNY) +8.82% to 18.63
    • Pasifik Eurasia Lojistik Dis Ticaret AS (IS:PASEU) +8.76% to 202.30
    • Gen Ilac ve Saglik Urunleri Sanayi ve Ticaret AS (IS:GENIL) +8.53% to 12.09

On the downside, Odine Solutions Teknoloji Ticaret ve Sanayi AS (IS:ODINE) led losses, sliding 9.98% - down 254.00 points to 2,291.00 at the close. Sarkuysan Elektrolitik Bakir Sanayi ve Ticaret AS (IS:SARKY) declined 5.29% - falling 1.40 points to 25.06, and Ulker Biskuvi Sanayi AS (IS:ULKER) dropped 5.06% - down 4.95 points to 92.80.

  • Worst performers:
    • Odine Solutions Teknoloji Ticaret ve Sanayi AS (IS:ODINE) -9.98% to 2,291.00
    • Sarkuysan Elektrolitik Bakir Sanayi ve Ticaret AS (IS:SARKY) -5.29% to 25.06
    • Ulker Biskuvi Sanayi AS (IS:ULKER) -5.06% to 92.80

Across the exchange, advancing issues outnumbered decliners, with 328 stocks rising versus 283 falling, and 28 ending unchanged. Notably, shares of Pasifik Eurasia Lojistik Dis Ticaret AS (IS:PASEU) reached an all-time high in the session when they rose to 202.30.

Commodities and FX

Precious metals and oil moved higher on the day. Gold futures for December delivery gained 0.92%, rising by 42.01 to trade at $4,587.31 a troy ounce. In energy markets, crude oil for October settlement climbed 2.46% or $2.08 to $86.47 a barrel, while the October Brent contract increased 2.07% or $1.90 to $93.52 a barrel.

On currency markets, USD/TRY was up 0.06% to 47.95, and EUR/TRY rose 0.30% to 56.17. The US Dollar Index Futures was down 0.03%, trading at 98.70.


This session reflected uneven internals for Istanbul's market - several individual equities posted sizeable gains even as key sectors pulled the benchmark lower, and commodity strength coincided with small moves in FX and the US dollar futures contract.

Risks

  • Sector concentration risk - declines in Information Technology, Textile & Leather and Banking weighed on the broader index, potentially affecting investors exposed to these sectors.
  • Commodity-driven volatility - notable moves in gold and crude oil could influence commodity-sensitive companies and market sentiment.
  • Currency movement uncertainty - even modest shifts in USD/TRY and EUR/TRY can affect exporters, importers and firms with FX exposure.

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