BIST 100 loses 115 points as MSCI freeze weighs at midday
Published on 10/19/2026 at 13:34 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWSMSCI backdrop and rate decision
- At 1:00 p.m. TRT, BIST 100 stands at 11,607 points, down 115 points or 1.0 percent.
- MSCI's index freeze followed a 2.9 percent BIST 100 drop on Friday.
- ASELS and ASTOR were among the shares weighing on BIST 100 at midday.
- Turkey's central bank announces its rate decision on October 22 at 2:00 p.m. TRT.
BIST 100 is trading at 11,607 points at 1:00 p.m. TRT on October 19, 2026, down 115 points or 1.0 percent. The move follows MSCI's freeze on Turkish index changes, which preceded Friday's 2.9 percent decline, Apara reports.
ASELS and ASTOR are among the shares weighing on the index, according to GCM Investment. Midday breadth was weak, with 20 BIST 100 stocks higher, 78 lower and two unchanged.
Why is BIST 100 down today?
The benchmark opened at 11,746 points after Friday's close at 11,722 points. It reached 11,768 points before falling to 11,597 points during the first half, Capital reports.
MSCI's decision to freeze certain Turkish index changes remains the main market backdrop. The decision followed concerns about index transparency and free-float conditions, while the BIST 100 remains below the 11,900 and 12,000 resistance levels cited by market analysts.
BIST 100 sectors weaken across Istanbul
Services fell 1.2 percent, industry declined 1.1 percent and technology lost 1.6 percent by midday. The financial index was down 0.8 percent, while financial leasing and factoring was the weakest sector at 6.3 percent lower, according to GCM Investment.
Turkey's market also enters a week centered on monetary policy. Most economists expect a 100-basis-point cut, taking the policy rate from 37 percent to 36 percent, according to Hurriyet Daily News.
What comes next for BIST 100
- October 20, 2026, 10:00 a.m. TRT: Turkey releases September overseas producer prices and August international investment position data, Foreks reports.
- October 21, 2026, 10:00 a.m. TRT: Turkey publishes manufacturing capacity utilization and real-sector confidence data, Foreks reports.
- October 22, 2026, 2:00 p.m. TRT: The Central Bank of the Republic of Turkiye announces its policy decision, with a 100-basis-point cut to 36 percent the median expectation, Sabah reports.
BIST 100 price data for October 19, 2026
BIST 100 stood at 11,607 points at 1:00 p.m. TRT on October 19, 2026, according to Capital. It was down 115 points or 1.0 percent from the previous close of 11,722 points. The index opened at 11,746 points and traded between 11,597 and 11,768 points.
BIST 100 by the numbers on October 19, 2026
- Index: BIST 100
- Home exchange: Borsa Istanbul, Turkey
- Level at 1:00 p.m. TRT on October 19, 2026: 11,607 points
- Change versus previous close of October 16, 2026: down 115 points (down 1.0 percent)
- Previous close: 11,722 points
- Open: 11,746 points
- Day high / day low: 11,768 points / 11,597 points
- Next scheduled event: October 20, 2026, 10:00 a.m. TRT: Turkey overseas producer prices and international investment position data
