Why did Sensex swing over 800 points to end flat on Wednesday?

Sensex ended flat at 82,276.07, despite a swing of over 800 points between the day's high and low on Wednesday. This comes as the market experienced profit booking, FII selling and Nifty failing to rise above 25,670. "While IT companies' valuations have turned attractive after the recent drop, investors will stay cautious because AI's impact...remains uncertain," an expert said.