Pound surges to a five year high against US currency. Buffett also said to be betting against greenback The pound surged against the dollar yesterday amid speculation that Warren Buffett and George Soros, the world's most famous speculators, are betting the US currency will plummet. Sterling powered to a five-year high against the dollar for a second day as concerns over the US current account deficit continued to outweigh evidence of a rebounding economy. Traders believe selling the dollar is a one-way bet, and some latched on to rumours that speculators were building "short" positions on the dollar - betting...