Considering 30-days investment horizon, The Dow Chemical Company is expected to under-perform the Dolby. But the stock apears to be less risky and, when comparing its historical volatility, The Dow Chemical Company is 1.29 times less risky than Dolby. The stock trades about -0.11 of its potential returns per unit of risk. The Dolby Laboratories Inc is currently generating about -0.01 of returns per unit of risk over similar time horizon. If you would invest  3,481  in Dolby Laboratories Inc on May 20, 2013 and sell it today you would lose (30.00) from holding Dolby Laboratories Inc or give up 0.86% of portfolio value over 30 days.