The market for initial public offerings has recently delivered some great first-day gains for investors who were able to get shares before the companies went public.That left us with 11 names. First up:CureVac, which was the screen’s best-performing IPO and had a total return of 596.75%. CureVac specializes in the messenger RNA, or mRNA, technology that is the basis of several leading Covid-19 vaccine programs. The German biotech company went public inAugust at $16 a shareand soared 249% in its