Assuming 30 trading days horizon, AEX Amsterdam is expected to generate 0.97 times more return on investment than Hang. However, AEX Amsterdam is 1.03 times less risky than Hang. It trades about -0.32 of its potential returns per unit of risk. Hang Seng is currently generating about -0.51 per unit of risk. If you would invest  37,211  in AEX Amsterdam on May 20, 2013 and sell it today you would lose (2,102) from holding AEX Amsterdam or give up 5.65% of portfolio value over 30 days.