September is supposed to be Wall Street’s notorious villain, rattling the stock market and driving investors to panic — but this year, it eschewed the role. Instead, the S&P 500 and the Nasdaq ...

Animal spirits were high in September, as the S&P 500 registered its best September performance in 15 years. Today, in a dystopian market twist, one of the largest components of the S&P 500 is trading ...