Before the SEC shut him down at age 15, Jonathan Lebed made a habit of hyping penny stocks in Internet chat rooms from his New Jersey bedroom, and then selling them as word spread and interest gathered. A classic “pump-and-dump” strategy. Lebed later settled with the SEC, forfeitting $285,000 without admitting any wrongdoing. He continues to trade actively and sell stock tips through his online newsletter. I first learned about him Michael Lewis’s great article several years ago in the NYT Magazine, where Lebed’s childlike “playing” with the stock market reminded me of Glenn Gould’s more musical “playing” of it.