BIST 100 falls 2.5 percent as Sutcu resignation hits stocks
Published on 10/19/2026 at 22:53 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWSClosing balance and dates
- BIST 100 closed at 11,430 points on October 19, down 292 points or 2.5 percent.
- Mahmut Sutcu's resignation coincided with a 1.95 percent fall in the holding index.
- Tekfen Holding was the weakest major mover, falling 10.0 percent.
- Turkey's external position data are due October 20, 2026, at 10:00 a.m. TRT.
BIST 100 fell 292 points, or 2.5 percent, to 11,430 points on October 19. Selling accelerated after Capital Markets Board Chairman Mahmut Sutcu resigned, while Deputy Finance Minister Osman Celik filed for retirement.
Tekfen Holding was among the session's weakest large movers, falling 10.0 percent. The benchmark opened at 11,746 points after Friday's 2.9 percent drop, according to Anadolu Agency.
Why did BIST 100 fall on Monday?
The resignation news added to existing pressure after a sharp decline on Friday. CNBCE reported that the holding index fell 1.95 percent, while the banking index gained 0.28 percent.
The financial leasing and factoring sector was the weakest sector, falling 7.39 percent. The session ended with 85 BIST 100 stocks lower, 12 higher and three unchanged, according to Manset Haber.
Winners and losers in BIST 100
Winners and losers at the October 19 close were listed by Investing.com:
- Ag Anadolu Grubu Holding up 1.5 percent
- TAV Havalimanlari Holding up 1.3 percent
- Sok Marketler up 1.1 percent
- Tekfen Holding down 10.0 percent
- Kirac Galvaniz down 10.0 percent
- Turkiye Sigorta down 9.9 percent
BIST 100's intraday range shows the selling pressure
The index reached 11,768 points during the session before falling to 11,397 points. It finished 292 points below the previous close of 11,722 points, with total turnover of 106.1 billion Turkish lira, Borsamatik reported.
What comes next for BIST 100
- October 20, 2026, 10:00 a.m. TRT: Turkey releases September producer prices and August international investment position data, Foreks reports.
- October 22, 2026, 2:00 p.m. TRT: The Central Bank of the Republic of Turkiye announces its monetary policy decision; the policy rate is expected at 37 percent, according to EconoTimes.
BIST 100 price data for October 19, 2026
BIST 100 closed at 11,430 points on October 19, 2026, according to CNBCE. It fell 292 points, or 2.5 percent, from the previous close of 11,722 points. The index opened at 11,746 points and traded between 11,397 and 11,768 points.
BIST 100 by the numbers on October 19, 2026
- Index: BIST 100
- Home exchange: Borsa Istanbul, Turkey
- Close on October 19, 2026: 11,430 points
- Change versus previous close of October 16, 2026: down 292 points (down 2.5 percent)
- Previous close: 11,722 points
- Open: 11,746 points
- Day high / day low: 11,768 points / 11,397 points
- Top gainer: Ag Anadolu Grubu Holding up 1.5 percent
- Top loser: Tekfen Holding down 10.0 percent
- Next scheduled event: October 20, 2026, 10:00 a.m. TRT: Turkey's producer prices and international investment position data
