Anyone who followed Buffet into that trade, lost 50% of their money.
But did Buffet actually make a bad trade. Remember, GS is giving Buffet a 10% return on his investment.
Assuming in 10 years time, GS goes back up to the price that he originally invested his money, Buffet will still make a 100% or 10% per year.
Now, lets assume GS stays around $ 62/sh for the next 10 years, then buffet still made a 50% and did not LOSE any money for himself or his shareholders.
Now Buffet could still dollar cost down and buy another chunk of GS if he still believes in the company. I don't remember if Buffet ever dollar costs down, or just invests once, and holds forever. I did notice many of the stocks that he has held forever do pay dividends even if he does not.
More than 1/2 the stocks I invest in, pay dividends. My worst performing stock is one that does not pay a dividend, but should still go up if they win a court verdict.