On this week's "Investing With IBD" podcast, hedge fund manager Jim Roppel returns to the show to share his updated view on the market after a disastrous earnings season for growth stocks. Roppel explains four critical rookie mistakes to avoid, his trend template for "True Market Leaders" and what he calls the "magic elixir" for the best stocks to buy. Plus, he breaks down a few key crypto charts and the potential impact of a blowup in China's currency.

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