BIST 100 ends 2.9 percent lower as MSCI freezes changes
Published on 10/16/2026 at 18:55 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWSMSCI decision and next dates
- BIST 100 closed at 11,722 points on October 16, down 348 points or 2.9 percent.
- MSCI froze Turkish index changes after market-access concerns, while all BIST sectors declined.
- Astor Enerji was the biggest loser, down 10.0 percent; Global Yatirim Holding led gainers up 0.6 percent.
- Turkey's capacity utilization data are due October 19 at 4:00 p.m. TRT.
The BIST 100 closed at 11,722 points on October 16, down 348 points or 2.9 percent, as MSCI froze some Turkish index changes, CNBC-e reported.
Astor Enerji was the weakest major mover, falling 10.0 percent. Global Yatirim Holding was the strongest gainer, up 0.6 percent, according to Investing.com.
Why did the BIST 100 fall 2.9 percent?
MSCI said it was freezing selected Turkish index changes until further notice. The decision covers increases in foreign inclusion factors and constituent counts, as well as additions to the MSCI Turkey Investable Market Index.
The benchmark opened at 11,896 points after Thursday's close at 12,070 points. It reached 11,653 points during the session before finishing at 11,722 points. The index also marked a new six-month low, according to Investing.com.
Winners and losers in the BIST 100
Winners and losers at the Istanbul close were listed by Investing.com:
- Global Yatirim Holding up 0.6 percent
- Akfen Yenilenebilir Enerji up 0.5 percent
- Borusan Birlesik Boru Fabrikalari up 0.3 percent
- Astor Enerji down 10.0 percent
- ODAS Elektrik down 9.4 percent
- Zorlu Enerji down 6.9 percent
All sector indexes declined. Financial leasing and factoring fell 5.7 percent, while banking and holding indexes lost 1.9 percent and 2.5 percent. Declining shares outnumbered advancing shares 558 to 77, with nine unchanged, Anadolu Agency reported.
BIST 100 finished the week 4.4 percent lower
The benchmark lost 4.4 percent during the week and traded on turnover of TRY 116.2 billion on Friday. The MSCI decision added to selling pressure after the index had already fallen on Thursday.
What comes next for the BIST 100
- October 19, 2026, 4:00 p.m. TRT: Turkey's October capacity utilization data, listed in the economic calendar of Minkabu.
- October 22, 2026: The Central Bank of the Republic of Turkiye is scheduled to announce its policy decision, with the policy rate at 37.0 percent, Morningstar reported.
BIST 100 price data for October 16, 2026
The BIST 100 closed at 11,722 points on October 16, down 348 points or 2.9 percent from the October 15 close of 12,070 points, according to CNBC-e. It opened at 11,896 points and traded as low as 11,653 points during the session.
BIST 100 by the numbers on October 16, 2026
- Index: BIST 100
- Home exchange: Borsa Istanbul, Turkey
- Close on October 16, 2026: 11,722 points
- Change versus previous close of October 15, 2026: down 348 points (down 2.9 percent)
- Previous close: 12,070 points
- Open: 11,896 points
- Top gainer: Global Yatirim Holding up 0.6 percent
- Top loser: Astor Enerji down 10.0 percent
- Next scheduled event: October 19, 2026, 4:00 p.m. TRT: Turkey capacity utilization data
