Was just thinking on this earlier.. Warren Buffett / Hathaway bought in $5bn worth of warrants @ $115 in late September for Goldman Sachs. At the time the markets were imploding. Everybody was saying how crazy that was.
I remember reading in here why some were writing off his "stupid" investment at the time, and indeed he didn't pick the bottom as you can see from the chart.
However in the end, I think $1.74bn (and running I assume) is not a bad profit in 10 months is not too bad. Current price = $155
I can see why he has got into his position today as being the most successful investor in the world.. Amazing!