BIST Reverse‑Buy Index to Undergo Major Overhaul on 07.08.2026

The periodic valuation exercise for the Borsa Istanbul Reverse‑Buy Index has concluded, with new rules coming into effect on 07.08.2026.

Framework of the New Rules

■Re‑valuation Criteria: Updated thresholds consider a 30% market volatility swing observed during 2025‑2026.

■Equity Selection: Liquidity, trading volume, and dividend yield will carry more weight; low‑market‑cap stocks will be excluded.

■Frequency of Buybacks: The schedule will shift from twice a month to four times a month, aiming to boost liquidity.

Impact on Market Dynamics

■Liquidity Surge: Anticipated 15% increase in trading volume.

■Investor Appeal: The index becomes a more attractive vehicle for mid‑size investors.

■Regulatory Oversight: The Central Bank of the Republic of Turkey (TCMB) will monitor compliance closely to maintain financial stability.

Operational Adjustments

■Technical Infrastructure: BIST will integrate an algorithmic trading system, cutting transaction times by 20%.

■Transparency: Daily reports will be made publicly available, enhancing investor access.

■Risk Management: Risk profiles of constituent companies will be reassessed, limiting high‑risk equities.

Expert Insight: This overhaul is a pivotal step toward aligning BIST with global standards and bolstering investor confidence. Expanding the scope of the reverse‑buy index can strengthen market liquidity and support macro‑economic resilience. In the context of tightening SME credit and slowing commercial loan growth, increased utilization of such instruments may improve risk distribution and enhance the robustness of the banking sector.