A Barclays strategist explains why it’s time to turn cautious on U. S. stocks, and what it will take for him to turn bullish again.
Source: [MarketWatch](https://www.marketwatch.com/story/why-exploding-retail-euphoria-and-leveraged-etfs-have-scared-one-stock-market-bull-into-turning-cautious-bdd2d4f2?mod=mw_rss_topstories)