The U.S. stock market has been on a tear for more than three years — but the people running America's biggest companies are suddenly selling into the strength at a pace not seen since the last major market peak.Corporate insider selling has surged to its highest sell‑to‑buy ratio in five years, according to data cited by Maverick Equity Research. In an X.com post, the firm warned that "U.S. Corporate Insiders like & love the current high valuations as they are quite selling: highest Selling/Buying ratio in ...