 Shares of Jasper Therapeutics Inc. JSPR, 111.15 soared 106.2 in volatile morning trading, enough to pace the Nasdaqs gainers, after Oppenheimer analyst Jay Olsons bullish endorsement the day after the stock closed at a record low. The stock had been halted for volatility twice in the first half hour after the open, as trading volume swelled to 20.7 million shares. 