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Istanbul exchange lifts short-selling ban after Iran war rout

A general view of the Borsa Istanbul (BIST) office in Istanbul, Türkiye, August 27, 2025. (AA Photo)
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A general view of the Borsa Istanbul (BIST) office in Istanbul, Türkiye, August 27, 2025. (AA Photo)
June 29, 2026 10:13 AM GMT+03:00

Türkiye's stock exchange, Borsa Istanbul, has lifted its temporary ban on short selling and restored its standard order-to-trade ratio after emergency measures introduced during the Iran war expired, returning the country's equity market to normal trading rules.

According to a disclosure made on Monday, the Capital Markets Board's (CMB) temporary restrictions, which had been in place between March 2 and June 26, had ended. As a result, the standard 5:1 order-to-trade ratio returned on June 29.

What changed during market rout

The CMB introduced the measures after Turkish stocks came under heavy selling pressure following the outbreak of the Iran war. The restrictions, including a ban on short selling, were aimed at calming markets and limiting volatility during the sharp downturn.

Short selling is a trading strategy in which investors borrow shares and sell them with the expectation of buying them back later at a lower price.

While it can improve market liquidity and price discovery, Turkish regulators often restrict the practice during periods of severe market stress because it can accelerate declines.

The order-to-trade ratio measures the number of orders entered, modified or canceled relative to executed trades. In March, Borsa Istanbul tightened the ratio from 5:1 to 3:1 to curb excessive order activity and algorithmic trading as markets turned volatile.

Candlestick chart shows the benchmark BIST 100 index from July 2025 to June 2026. (Chart: TradingView)
Candlestick chart shows the benchmark BIST 100 index from July 2025 to June 2026. (Chart: TradingView)

War sparks foreign selloff

During the first week of the Iran conflict, Turkish equities recorded a net foreign outflow of $755.6 million, marking the largest weekly outflow on record during that period. Cumulative outflows peaked at $1.3 billion between Feb. 27 and April 3.

As of June 19, cumulative foreign outflows since the start of the war stood at $1.2 billion, reversing the $2.4 billion inflow recorded between the start of the year and the outbreak of the conflict.

Despite the pressure, Turkish equities still posted net foreign inflows of $1.3 billion since the start of the year as of the week ending June 19.

The benchmark BIST 100 index opened Monday's session up 0.3% at 14,321.44 points.

June 29, 2026 10:24 AM GMT+03:00
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