The only reason anybody should be unhappy just because the stock he purchased dropped $10 immediately is if he's a day trader. If you look at the strengths, as

The only reason anybody should be unhappy just because the stock he purchased dropped $10 immediately is if he's a day trader. If you look at the strengths, assets, and liabilities of a company, conclude it's a good purchase, and buy in, you should be happy unless some of those factors change. The stock becoming an even better buy doesn't change your good buy.