Connect Biopharma Holdings Ltd. pointed to positive secondary endpoint data and a numerical trend on the primary endpoint in favor of its S1P receptor modulator, CBP-307, in ulcerative colitis, but those results weren’t enough to keep the stock (NASDAQ:CNTB) from falling by more than 57% to close at 82 cents, as investors focused on the primary endpoint miss and the company’s decision to partner the program going forward.