The BSE benchmark Sensex fell by as much as 630.64 pts today to below 27,000-pt level today, dragged down by across-the-board selling in BHEL, NTPC, HDFC, Axis Bank, Infosys and Wipro.

Here are 5 reasons why:

1. Sustained FII outflows – foreign portfolio investors sold shares worth Rs 756.52 crore on Tuesday

2. US stock markets crashed overnight

3. Oil prices are surging

4. Greek debt back at crisis point

5. Quarterly earnings forecasts of India Inc have been slashed by analysts, latest by Credit Suisse

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