The stock market has been turned completely upside down

Business Insider executive editor Sara Silverstein discusses how the stock market has been turned upside down in September. The stocks that were the best year-to-date performers through August have been the worst in September, while those with the weakest returns over the first eight months have led the way higher. A similar complete reversal can also be seen at the sector level, with market-leading tech and healthcare stocks giving way in this month to energy and telecom. This rotation has helped propel US stocks to new records. It seems that whenever the equity market loses a driver of gains, another is ready to step up and take its place.