U.S. stock investors may be complacent regarding the ability of the stock market to withstand higher interest rates. Their confidence may come from the fact that, historically, markets have not peaked until 12-24 months after the Fed begins to tighten. This assumes the tightening cycle begins with the first official rate hike. But if it really began with the increase in the Shadow Rate, then a December rate hike will already be 19 months into the tightening cycle! Plus, given how overvalued stocks may currently be, and the amount of corporate debt accumulated to finance share buybacks, this bull market may be far more vulnerable than most to higher interest rates.