UPDATE 1-Speculators cut long US dollar bets, euro shorts surge -CFTC, Reuters

(Adds details on Swiss franc net shorts and table) NEW YORK, Jan 23 (Reuters) - Speculators slightly trimmed bets in favor of the U.S. dollar in the latest week, and bolstered net shorts on the euro to their largest level in 2 -1/2 years, according to data from the Commodity Futures Trading Commission released on Friday. The value of the dollar's net long position inched lower to $46.22 billion in the week ended Jan. 20, from $46.96 billion the previous week. Despite the slight declin