The Medical group has plenty of great stocks, but investors should always be looking for companies that are outperforming their peers. Has Aldeyra Therapeutics, Inc. (ALDX) been one of those stocks this year? By taking a look at the stock's year-to-date performance in comparison to its Medical peers, we might be able to answer that question.Aldeyra Therapeutics, Inc. is one of 1048 individual stocks in the Medical sector. Collectively, these companies sit at #5 in the Zacks Sector Rank. The Zacks Sector Ran ...