Stock Market Highlights: Sensex plunged 1546.84 pts or 1.88% to close at 80,722.94, and Nifty 50 dragged 495.20 pts or 1.96% to settle below 25,000 mark at 24,825.45; STT on futures contracts increased from 0.02% to 0.05% in Budget

Sensex, Nifty, Share Price Highlights: Benchmark indices were trading in sharply negative territory after the Budget proposed taxing buyback for all types of shareholders as capital gains, and the securities transaction tax on futures was raised to 0.05% from present 0.02%. STT on options premium and exercise of options are both proposed to be raised to 0.15% from the present rate of 0.1% and 0.125%, respectively.