Diwali sale or trap? 12 stocks crash at least 40% after giving multibagger returns

12 stocks, including Cochin Shipyard and Waaree Renewable Technologies, have fallen by at least 40% from their 52-week highs after significant gains last year. Most of these stocks, comprising PSUs and other prominent companies, are experiencing corrections due to profit booking and expensive valuations amidst market volatility and earnings slowdown.