After a day of strong buying, the Pakistan Stock Exchange (PSX) witnessed a sharp reversal on Tuesday as heavy selling gripped the market amid heightened political uncertainty, security fears, and regional tensions.

The benchmark KSE-100 index plunged 3,667.90 points, or 2.27%, to close at 157,870.50. During the session, the index moved between an intra-day high of 161,516.75 and a low of 157,765.92, reflecting a volatile trading day dominated by risk aversion.

Investor confidence weakened after the Senate approved the 27th Constitutional Amendment with a two-thirds majority, raising political uncertainty. Reports of terrorist attacks in Islamabad and Wana further deepened investor unease, triggering broad-based selling across key sectors.

Selling pressure hit major segments including a

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