This bank crunched 200 years of data to show why investors should stick with stocks over the long term
1. Stocks underperformed cash 0.8% of the time over 25 years. 2. High valuations signal potential weak returns for stocks. 3. S&P 500's P/E ratio recently topped 23, highest in years. 4. Negative equity returns occurred 13.6% of five-year periods. 5. Investor concerns about market risks influence stock performance.