It’s not often that getting an NDA rejected by the U.S. FDA is cause for a company’s stock to rise. But in the case of Ascendis Pharma A/S, the agency’s anticipated complete response letter (CRL) for Transcon PTH (palopegteriparatide) offered some much-needed clarity and a potentially optimistic time frame for an NDA resubmission seeking approval of the once-daily hormone replacement therapy for hypoparathyroidism, news that sent the company’s shares (NASDAQ:ASND) up 24%, or $16.78, to close May 1 at $86.74.