# Turkish BIST100 market outlook and volatility > Live situation record from CLSTR: https://clstr.news/situations/turkish-bist100-market-outlook > Updated: 2026-09-12T08:12:53.000Z. Sources: 106. Developments: 15. The BIST 100 index concluded the week of September 11, 2026, with a 3.25 percent increase, closing at 14,467.25 points. During this period, the index fluctuated between 14,000.94 and 14,673.07. Stock performances were highly divergent; Pasifik Teknoloji (PATEK) led gains with a 31.49 percent increase, while Odine Solutions Teknoloji (ODINE) saw the largest weekly loss at 40.89 percent. On September 14, the index faced renewed downward pressure, closing down 1.60 percent at 14,235.83 points on a transaction volume of 155.7 billion lira. The technology index declined by 5.04 percent, and both banking and holding indices also experienced losses. Notably, Bank of America clients recorded significant net sales, with Aselsan being one of the most heavily sold stocks. This volatility was driven by escalating geopolitical risks in the Middle East. Tensions rose following reports that drones launched from Iraq damaged an east-west oil pipeline in Saudi Arabia, prompting Riyadh to close the pipeline. Houthi attacks on Saudi Arabia have further heightened concerns over oil supply, pushing Brent crude prices above $107 per barrel. Additionally, a planned meeting in Oman between Iran and Arab nations regarding the situation in the Strait of Hormuz was postponed. Market participants also remained focused on global concerns regarding artificial intelligence development and upcoming monetary policy decisions from the US Federal Reserve. In the United States, the 10-year Treasury yield reached 5.03%, its highest level since July 2007, as investors anticipate a potential interest rate hike to combat inflation. European markets have also seen volatility, with the Italian-German bond spread approaching 90 basis points due to energy cost concerns and rising debt financing needs. ## Claims - The BIST 100 index fell about 1.55 % to 13,292.93 points on 30 July 2026. (disputed by 5 sources) - Sector performance showed chemicals, petroleum & plastics up about 0.95 % while the IT sector fell about 4.5 %. (disputed by 3 sources) - BIST 100 closed at 13,458.10, up 165.17 points (1.24%). (disputed by 2 sources) - Bank of America customers sold a net 1.2 billion TL of shares, with Yapı ve Kredi Bankası the largest single sale at 609.2 million TL. (disputed) - Banking sector index rose 0.43%, holdings up 0.23%, textile up 0.83%, while the technology index fell 4.30% at the open. (disputed) - Information‑technology sector gained about 5.7% on the day. (disputed) - Bank of America’s clients bought a net 4.7 billion TL of Turkish shares, with Turkish Airlines the largest single purchase at about 1 billion TL. (disputed) - In Samsun, gram gold purchase price is approximately 6,803 TL and sale price is 6,885 TL. (disputed) - Gram gold is trading at a purchase price of 6,855 TL and a sale price of 6,865 TL. (disputed) - Gram gold purchase price is 6,858.62 TL and sale price is 6,859.43 TL. (disputed) - August's Consumer Price Index (CPI) rose 3.4% year-over-year. (corroborated by 4 sources) - Global market pressure stemmed from the U.S. Federal Reserve keeping its policy rate at 3.50‑3.75 % and from Middle‑East geopolitical tensions. (corroborated by 3 sources) ## Timeline ### 2026-09-12: Borsa İstanbul BIST 100 index rises 3.25 percent weekly The BIST 100 index rose 3.25 percent this week, while Pasifik Teknoloji led stock gains and Odine Solutions saw the sharpest decline. Bulls Portföy's fund recorded a 144.94 percent weekly return. 5 sources. https://clstr.news/cluster/borsa-istanbul-bist-100-index-rises-325-percent-weekly ### 2026-09-09: Gold and silver markets react to US inflation and Fed rate hike expectations Gold and silver prices face volatility as US inflation data (3.4% YoY) strengthens expectations for a Federal Reserve rate hike, impacting global markets and Borsa Istanbul. 56 sources. https://clstr.news/cluster/borsa-istanbul-rises-ahead-of-tcmb-interest-rate-decision ### 2026-09-02: Borsa İstanbul index falls below 14,000 level amid market volatility Borsa İstanbul's BIST 100 index fell below 14,000 amid a weekly decline, while TESK President warns diesel price hikes may trigger inflation. 10 sources. https://clstr.news/cluster/borsa-istanbul-closes-lower-as-bist-100-index-declines ### 2026-08-29: Borsa İstanbul opens lower amid global market pressures Borsa İstanbul opened the week lower amid global uncertainty from Fed signals and Middle East tensions. While the BIST 100 declined, Halkbank led weekly gains and industrial activity shows limited growth. 10 sources. https://clstr.news/cluster/borsa-istanbul-bist-100-index-closes-week-up-087-percent ### 2026-08-26: Borsa İstanbul shows volatility with banking sector gains Borsa İstanbul's BIST 100 index showed volatility, driven by banking sector gains and varying sectoral performances, while the Turkish Lira and gold prices saw minor fluctuations. 16 sources. https://clstr.news/cluster/borsa-istanbul-bist-100-index-opens-higher-on-wednesday ### 2026-08-25: Borsa İstanbul dividend stocks report mixed 2026 H1 results BIST Dividend 25 companies show varied 2026 H1 results, with AKSA leading profit growth, while several firms including DoğuşOtomotiv announce no dividend payments. 2 sources. https://clstr.news/cluster/borsa-istanbul-dividend-stocks-report-mixed-2026-h1-results ### 2026-08-13: Borsa İstanbul companies report 2026 mid-year financial results Borsa İstanbul companies reported 2026 mid-year financial results, including significant profit shifts for ICBC Turkey and Akfen Yenilenebilir Enerji, alongside notable spikes in trading volume for Aksa Enerji. 3 sources. https://clstr.news/cluster/borsa-istanbul-companies-report-2026-mid-year-financial-results ### 2026-08-12: Borsa İstanbul BIST 100 index surpasses 14,000 points Borsa İstanbul's BIST 100 index surpassed 14,000 points following a strong rally. TCMB Governor Fatih Karahan also updated inflation forecasts for 2026-2028 during a recent briefing. 16 sources. https://clstr.news/cluster/barem-ambalaj-shares-drop-82-following-concordat-announcement ### 2026-08-10: Borsa İstanbul BIST 30 futures rise as corporate earnings grow Borsa İstanbul's BIST 30 futures rose 0.34% to start the week, while 13 companies reported significant EBITDA growth and stock returns exceeding 40% over the last three months. 2 sources. https://clstr.news/cluster/borsa-istanbul-bist-30-futures-rise-as-corporate-earnings-grow ### 2026-08-07: BIST 100 index slips modestly as Tekfen Holding tops weekly gainers BIST 100 slipped 0.14% to 13,779.39 points; Tekfen Holding surged 35% weekly, Şekerbank fell 12.6%, and Bank of America sales hit EREGL down 6.9%. 13 sources. https://clstr.news/cluster/turkish-bist-100-climbs-above-13800-as-lira-steadies-against-dollar-euro-and-pound ### 2026-07-31: Borsa Istanbul posts mixed July results amid capital boosts and digital gold rules BIST 100 fell 3.48% to 13,458.10 in July, tech stocks led losses, banking rose. Twelve firms announced free‑capital increases, six declared dividends, and a new law enables tokenised gold and silver on Borsa I. 16 sources. https://clstr.news/cluster/borsa-istanbul-gains-modestly-as-bist-30-futures-rise-and-bist-100-opens-higher ### 2026-07-29: BIST 100 falls sharply as short‑sale uptick rule is activated BIST 100 dropped 1.5 % to ~13,293 on 30 July 2026, prompting the short‑sale uptick rule; Fed policy, Middle‑East tensions and sector losses fueled the fall, while BofA sold 1.2 bn TL of shares. 11 sources. https://clstr.news/cluster/borsa-istanbul-bist-100-slides-as-bank-stocks-lead-decline ### 2026-07-27: BIST 100 dips as Fed decision looms and geopolitics ease BIST 100 closed at 13,774.77 points, down 1.21%, with 180.4 bn TRY volume; earlier rise turned lower amid Fed decision expectations and easing US‑Iran tension; Ata Yatırım lifted its 12‑month target to 19,600. 9 sources. https://clstr.news/cluster/borsa-istanbul-eyes-19000-points-as-daily-index-swings ### 2026-07-24: BIST 100 slides 0.27% as top gainers and losers emerge BIST 100 fell 0.27% to 13,943.87 points; Pasifik Eurasia Lojistik rose 22.28% while Şekerbank dropped 40.09%; tech up, leasing‑factoring down, global risks curb sentiment. 15 sources. https://clstr.news/cluster/turkeys-stock-and-crypto-markets-slip-on-july-24-amid-global-tensions ### 2026-07-01: Turkey's BIST100 target raised as Fitch downgrades banks and insurers outlook Tacirler Yatırım projects Turkey's BIST100 to hit 19,800 points within a year, while Fitch cuts the outlook for Turkish banks, non‑bank financiers and insurers to deteriorating amid high inflation and prolonged 2 sources. https://clstr.news/cluster/turkeys-bist100-target-raised-as-fitch-downgrades-banks-and-insurers-outlook --- Cite as: Turkish BIST100 market outlook and volatility. CLSTR, https://clstr.news/situations/turkish-bist100-market-outlook