Investors are feeling very good about the U.S. stock market. That may be a problem in the making. Wall Street is facing a number of highly visible, and potentially very disruptive, headwinds, but so far stocks have essentially shrugged all of them off. Nearly every day, there are headlines about slowing economic growth both in the U.S. and abroad, a potential trade war, a breakdown in the momentum trade that has been lifting markets for years, and waning central bank accommodation and rising interest rates, among other factors. So far, investors don’t seem to care about any of these issues. The S&P 500 SPX, -0.40% broke out of a long-lasting correction and is currently trading about 1% below record levels, while the Nasdaq Composite Index COMP, -0.25% is 0.6% below all-time highs. The Dow Jones Industrial Average DJIA, -0.50% remains in a correction — meaning it hasn’t risen 10% from a low hit earlier this year, which itself represented a drop of 10% from a peak — but it is within 5% of records. The Cboe Volatility Index VIX, -6.70% is trading around 13, well below its long-term average between 19 and 20.via