The way to get really rich in US stocks in 2005 was to spot the next fad. Those who foresaw the incredible popularity of the iPod might have invested in Apple Computer, which gained 128.5 per cent.
On its own Apple accounted for a rise of 3.7 points in the S&P 500 index  more than any other stock.
Google, the dominant internet search engine, gained 120 per cent. But the truly perceptive would have seen the potential to profit from the twin trends of AmericaÂs obesity epidemic and the rise of the internet