Stocks Hitting 52-Week Lows - Acadia Healthcare Co (NASDAQ:ACHC), Marinus Pharma (NASDAQ:MRNS)

Fitbit Inc FIT shares reached a new 52-week low of $7.54. Fitbit shares have dropped 73.76 percent over the past 52 weeks, while the S&P 500 index has gained 12.35 percent in the same period.
Proteon Therapeutics Inc PRTO shares fell 9.8 percent to touch a new 52-week low of $2.26. JMP Securities, Raymond James and Cowen downgraded Proteon Therapeutics to Market Perform. On Tuesday, Proteon Therapeutics disclosed that it did not meet primary endpoint in PATENCY-1 trial.
Acadia Healthcare Company Inc ACHC shares reached a new 52-week low of $32.95. Acadia Healthcare shares have declined 43.73 percent over the past 52 weeks, while the S&P 500 index has gained 12.35 percent in the same period.
Marinus Pharmaceuticals Inc MRNS shares fell 6.4 percent to touch a new 52-week low of $0.870. Marinus Pharmaceuticals shares have tumbled 84.38 percent over the past 52 weeks, while the S&P 500 index has gained 12.35 percent in the same period.