The stock market has only done this 3 times since the Gulf War. It's not a good sign

The poor breadth in the stock market is starting to worry investors. The S & P 500 rose to all-time highs on Monday, climbing above 7,400 as artificial intelligence continued to push the broader index farther above its March low; stocks are up more than 17% since falling to 6,316.91 on March 30. Memory stocks, especially, have been on a tear, with shares of Micron Technology more than doubling, up roughly 140%, over the same span. …