FX speculators increased their bets in favor of the U.S. dollar to their highest in a month in the lastest week, using Commodity Futures Trading Commission data released on Friday. One major house calculation puts the value of the dollar's net long position at $20.08 billion in the week ended September 3, from $15.82 billion the prior week. The net long dollar position rose for a second straight week though speculators have been net long the dollar since mid February. Euro net long longs dropped by almost half this week ahead of the European Central Bank meeting to 22,738 contracts, from 40,081 contracts the week before. Yen short contracts rose marginally for a second straight week and now stand at 79,761 contracts from 78,353.