It wasn't easy to double in 2024, but these three stocks made it happen. They might be able to do it again.There are just a little more than 30 U.S. exchange-listed companies with market caps greater than $1 billion that more than doubled in the first half of this year. It's fair to say that most of them won't repeat the feat through the final six months of 2024. It doesn't mean that all of them won't deliver an encore performance.Cava (CAVA -0.67%), Hims & Hers Health (HIMS -2.34%), and Sweetgreen (SG -2.8 ...