The Financial Post reports in its Friday edition that in a few short weeks, U.S. President Donald Trump has started silencing the buy-the-dip traders who set the tone on Wall Street for the better part of two decades. A Bloomberg dispatch to the Post says that in their place are growing calls to lock in profits and sit on the sidelines while Mr. Trump's trade-war chaos casts uncertainty over who, if anyone, will emerge as the new era's stock-market winners. "Buying the dip now is like buying discounted tickets to a show without knowing who's performing," said Dave Mazza at Roundhill Investments. "The heightened uncertainty of tariffs and trade policy means investors could end up with either a blockbuster or a flop." Mr. Trump's style -- a scattershot approach resulting in a dizzying cycle of tariffs that are on, off and on again -- has shattered confidence that any bounceback will stick. However, Citigroup strategist Scott Chronert says the recent pullback in the S&P 500 makes the risk-reward more compelling. Others are seizing on the hunt for bargains. "These are opportunities to buy really good stocks at much more attractive multiples, especially the tech names," said Shana Sissel at Banrion Capital Management.