The Mustang Bio stock price closed on a high yesterday, trading at $0.75. The pharmaceutical company has gone vertical in the past 24 hours, climbing 476.9% to go from $0.13 to $0.75 in a single day. But why? Potential cancer breakthroughYesterday, Mustang Bio announced via press release that it had had promising results from clinical trials relating to an experimental treatment developed by Mustang Bio for Waldenstrom macroglobulinemia (“WM”), a rare form of blood cancer. The trial, which contained just 10 patients, showed a marked improvement over more traditional existing treatments for the…