Nifty 50 dips 200 points, Sensex crashes 600 points; why is Indian stock market down today? by Live mint | January 8, 2026 1:06 pm | Indian Stocks, Market, News Why is market down today: Experts have attributed these five reasons for the fall in Nifty 50, Sensex and other indices: FIIs selling, Russia Sanctions Act, fall in commodity prices, geopolitical tension, uand ncertainty on Trump’s tariffs