Offer your thoughts or opinion on the input financial query or topic using your financial background.

Can the risk of investing in an asset be different for different investors?
In a perfect market, share prices are by definition a perfect reflection of the true value of a share. Hence, you always get $10 for a share that's worth that much. In reality, the market is imperfect. Prices are somewhat of an average of all different estimates, and there's a cost-of-trading margin between sales and buy prices. Hence, in a perfect market it doesn't matter whether you have a stop loss order at $9.00. That just trades your stock worth $9 for cash worth the same $9. In an imperfect market, that trade nets you less. Furthermore, is risk a linear function of money? Perhaps not, if you bought on margin, need to lend extra and your interest rate increases with the extra credit demand.