Buying stocks just because they are rallying is a poor strategy. Meme stocks rallied last week after meme investor Keith Gill posted on X for the first time since the pandemic. AMC (AMC) soared as much as 308% May 13-14 and GameStop (GME) gained 271% to the peak of the same two-day period. But today those gains have vanished almost entirely.X Meanwhile, Robinhood Markets (HOOD) benefited from the spike in retail investing and gained 24% last week, while favored meme social media site Reddit (RDDT) rose 16%. ...