BIST 100 ends flat as Astor rallies, index loses 0.01 percent

Published on 10/27/2026 at 18:58 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

BIST 100 closed at 11,151 points after a 0.92-point loss, while Turkey prepares for half-day trading and the Fed decision on October 28.

Banking and Fed focus

BIST 100 closed at 11,151 points on October 27, down 0.92 points or 0.01 percent.
Insurance, sports, and retail shares led sector losses at the close.
Astor Enerji was the top gainer, rising 9.95 percent.
Turkey releases foreign trade data at 10:00 a.m. TRT on October 28 before the Fed decision.

BIST 100, TRAIMKB00010, Illustration mit AI erstellt.

BIST 100 closed at 11,151 points on October 27, losing 0.92 points or 0.01 percent. Insurance, sports, and wholesale and retail shares led the sectors lower at the close, Investing.com reported.

Astor Enerji was the strongest BIST 100 stock, rising 9.95 percent. Turkiye Sigorta fell 9.79 percent and reached a 52-week low, while Hektas lost 5.88 percent, Investing.com said.

Why did BIST 100 finish nearly flat?

The index opened at 11,138.10 points after Monday's close of 11,151.96 points. It reached an intraday high of 11,294.83 points and a low of 11,084.73 points before ending near the previous close, Manset Haber reported.

Turkey's September unemployment rate rose to 8.4 percent from the previous month. The release came during the session, while the Capital Markets Board also published rules for interim payments in liquidated investment funds, CNBC-e reported.

Winners and losers in BIST 100

Astor Enerji up 9.95 percent, Investing.com reports
Iskenderun Demir ve Celik up 8.09 percent, Investing.com reports
Tekfen Holding up 7.05 percent, Investing.com reports
Turkiye Sigorta down 9.79 percent: shares reached a 52-week low, Investing.com reports
Hektas down 5.88 percent: shares reached a three-year low, Investing.com reports
1000 Yatirimlar Holding down 4.62 percent: shares reached an all-time low, Investing.com reports

Declining stocks outnumbered advancing stocks by 399 to 226, with 16 unchanged. Trading volume reached TRY 90.7 billion, while the banking index fell 0.60 percent and the holding index dropped 1.04 percent, Haberturk reported.

What comes next for BIST 100

October 28, 2026, 10:00 a.m. TRT: Turkey releases September foreign trade statistics, Endeks24 reports
October 28, 2026, 10:00 a.m. TRT: Garanti BBVA earnings are scheduled during the half-day Borsa Istanbul session, FinSight reports
October 28, 2026, 9:00 p.m. TRT: The Federal Reserve is expected to hold rates at 3.75 percent to 4.00 percent, Yahoo Finance reports

BIST 100 price data for October 27, 2026

BIST 100 closed at 11,151 points on October 27, 2026, according to CNBC-e. It lost 0.92 points or 0.01 percent versus the previous close. The index opened at 11,138.10 points and traded between 11,084.73 and 11,294.83 points.

BIST 100 by the numbers on October 27, 2026

Index: BIST 100
Home exchange: Borsa Istanbul, Turkey
Close on October 27, 2026: 11,151 points
Change versus previous close: down 0.92 points (down 0.01 percent)
Open: 11,138.10 points
Day high / day low: 11,294.83 points / 11,084.73 points
Top gainer: Astor Enerji up 9.95 percent
Top loser: Turkiye Sigorta down 9.79 percent
Next scheduled event: October 28, 2026, 10:00 a.m. TRT: Turkey September foreign trade statistics