Are you in a managed account with him or is it just a regular brokerage account?
TBH, it's not really his job to "watch" individual stocks that you buy. Did he even recommend that stock to begin with or did you just come in with money and say "I wanna buy ATP" ?
If he recommended the stock to begin with, you might have a better case, but still probably not. But if you wanted to buy it and he had nothing to do with recomendation and merely transacted your buy order, it was not his job to watch the stock for you.
This post was edited on 3/11 at 12:12 pm