Business · Markets · 1 day ago
BIST 100 fell 6.53% over 23 days as BIST 30 dropped 3.63%
Borsa Istanbul’s main share indexes fell between 16 September and 9 October 2026, a period that began when a fund investigation started.
The BIST 100 closed at 13,122.58 points on 16 September and 12,265.98 on 9 October, a fall of 6.53%.
The BIST 30, which covers large companies, fell 3.63%, from 15,716.04 to 15,145.27 points.
The BIST 100’s percentage drop was about 1.8 times the BIST 30’s.
Separate figures showed the value of share portfolios fell from about 22.91 trillion lira at the end of August to 17.58 trillion at the end of September.
That was a decline of about 5.33 trillion lira, or 23.3%.
A further estimate put the loss by 9 October at more than 6.5 trillion lira.
The BIST 100 fell 6.53% over 23 days from 16 September to 9 October 2026.
The BIST 30 fell 3.63% over the same period.
The BIST 100 closed at 13,122.58 points on 16 September and 12,265.98 points on 9 October.
The BIST 30 closed at 15,716.04 points on 16 September and 15,145.27 points on 9 October.
Share portfolio value fell by about 5.33 trillion Turkish lira between the end of August and the end of September, according to data based on MKK statistics.
- Who
- The BIST 100 and BIST 30 indexes.
- What
- The indexes fell 6.53% and 3.63%, respectively.
- When
- Over 23 days, from 16 September to 9 October 2026.
- Where
- Borsa Istanbul, Turkey.
- Why
- The decline was measured from the start of a fund investigation on 16 September. The articles do not state what caused the falls.
This story does not have two clearly opposing sides.
The BIST 100 closed at 13,122.58 points and the BIST 30 at 15,716.04 points, as the fund investigation began.
MKK-based figures put share portfolio value at about 17.58 trillion Turkish lira, down from about 22.91 trillion lira at the end of August.
The BIST 100 closed at 12,265.98 points and the BIST 30 at 15,145.27 points.
- BIST 100 decline
- 6.53%
- BIST 30 decline
- 3.63%
- BIST 100 closing level, 16 September
- 13,122.58 points
- BIST 100 closing level, 9 October
- 12,265.98 points
- Share portfolio value reduction
- About 5.33 trillion Turkish lira between the end of August and the end of September
Sources
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