BIST 100 Plunges 3.50% as Index Falls to 10,827 Points

News: Gökhan Turhan

The BIST 100 index on Borsa Istanbul fell 3.50% to 10,827.88 points as of 3:02 p.m. on October 23, 2026. The benchmark lost 392.49 points, with selling pressure intensifying during the trading session.

Türkiye’s benchmark stock index recorded a sharp decline on the final trading day of the week. After closing the previous session at 11,220.37 points, the BIST 100 fell to 10,827.88 points as of 3:02 p.m. on October 23, bringing its daily loss to 3.50%.

The index opened the session at 11,234.39 points and climbed to an intraday high of 11,245.06 points. However, as selling pressure intensified, it dropped as low as 10,802.58 points, trading close to the 10,800-point threshold in the afternoon.

Selling Pressure Extends Into a Second Session

The previous session’s selling pressure and losses across individual stocks were among the key factors shaping the market’s performance. Market reports highlighted the impact of the decline in ASELSAN shares on the benchmark index. However, assessing how broadly the sell-off spread across the market also requires examining the performance of other large-cap stocks.

The absence of a stock market rally following the Central Bank of the Republic of Türkiye’s October 22 decision to cut its policy rate from 37% to 36% also brought investor expectations concerning the economic outlook and market risks into focus. Nevertheless, more comprehensive market data would be needed to establish a direct causal link between the rate decision and the index’s decline.

Investors Watch the 10,800-Point Level

The intraday low of 10,802.58 points emerged as a key level to watch in the short-term price movement. Whether the index can hold above this level and whether a potential recovery develops toward the close will be important in assessing market conditions on the final trading day of the week.

For the BIST 100 to move back toward its previous close of 11,220.37 points, selling pressure would need to ease. Although current figures indicate a significant decline in the benchmark index, whether the downturn will continue can only be assessed through subsequent price movements and additional market data.

Kaynak: Borsa Istanbul index data and the market reports provided.