These stocks listed here have risen between 225% and 275% this year.The S&P 500 has risen 16% this year, as it flirts with a third-straight year of 20% gains. It would be an impressive feat for the market. But that still pales in comparison to how well three of the hottest stocks on the index have performed.Robinhood Markets (HOOD 10.82%), Seagate Technology (STX +0.98%), and Western Digital (WDC +2.19%) are the top three performers on the index during the past 10 months. Are they still good buys? Let's tak ...