Spero Therapeutics, Inc. (NASDAQ:SPRO – Get Free Report)’s stock price passed below its two hundred day moving average during trading on Monday . Spero Therapeutics shares last traded at $1.15, with a volume of 1,373,021 shares traded. Get Spero Therapeutics alerts:Check Out Our Latest Analysis on Spero TherapeuticsSpero Therapeutics Stock PerformanceThe stock has a market cap of $72.95 million, a price-to-earnings ratio of 5.25 and a beta of 1.55. The business has a 50-day simple moving average of $2.09 and a two-hundred day simple moving average of $2.34. Recommended StoriesReceive News & Ratings for Spero Therapeutics Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Spero Therapeutics and related companies with MarketBeat.com's FREE daily email newsletter.