Here's what The Motley Fool's CEO, Tom Gardner, thinks investors should do now to beat the market.Investors in stock markets have witnessed historic volatility in 2025 so far. After peaking in February, the S&P 500 (^GSPC 0.40%) index briefly slipped into correction territory in April. Many feared a market crash, but the S&P 500 has instead staged one of its most dramatic V-shaped recoveries since and just hit a record high.The wild ride has left investors wondering whether the stock market is overheated an ...