Morgan Stanley has issued a warning regarding a potential correction in the U.S. stock market as the 10-year Treasury yield surpasses 4.5%. Michael Wilson, the bank's Chief Investment Officer, highlighted that rising long-term yields coupled with increased bond volatility could trigger the first significant market correction since March. Wilson emphasized that the breach of the 4.5% yield threshold, previously identified by Morgan Stanley as a critical level, could exert substantial pressure on equity valuations. This development signals heightened caution for investors as market dynamics shift with the evolving interest rate landscape.