Investors were haunted by the specter of share dilution.It isn't unusual for a biotech to raise capital after it posts positive results from a clinical trial. In the case of a new fundraising effort by Dyne Therapeutics (DYN 16.94%), however, investors aren't happy that the biotech is going to the well. Following the announcement of a significant secondary stock issue, market players traded out of Dyne on Tuesday, leaving its shares with a nearly 17% loss.300 million reasons for concernJust after market clo ...