[The 'September Curse' for U.S. Stocks Approaches, Market Pushed to Critical Threshold] According to CNBC, U.S. stocks barely maintained an upward trend amid volatility in August, but analysts warn that as the S&P 500 stalls at high levels, the rebound in U.S. Treasury yields and valuation discrepancies in Nvidia have pushed the market to a critical threshold. However, investors should not be deceived by this apparent 'calm.' Historical data shows that September is often the worst-performing month for U.S. stocks. In 2026, a presidential election year with strong prior market performance, seasonal factors may shift. Veteran market commentator Michael Santoli noted that what truly warrants caution is that several key market indicators are in a 'stretched' state. Once thresholds are breached, the market's dynamics could undergo a dramatic shift. Currently, the implied probability of a rate hike in September has risen to over 50%.