BUZZ-Deutsche Boerse, LSE extend gains as merger talks confirmed
** The London Stock Exchange says it is in merger talks with Deutsche Boerse (LSE: 0H3T.L - news) , confirming a Reuters report
** "That sounds very detailed and concrete. It (Other OTC: ITGL - news) seems to be in the bag already," a local trader says, adding he would put the likelihood of a deal going through at 75 pct
** Shares (Berlin: DI6.BE - news) in LSE gain 19 pct, heading for their biggest one-day gain in 10 yrs
** Deutsche Boerse jumps almost 8 pct, which would be its best day in almost 4 yrs
** Both cos were earlier trading down, in line with the broader market (RM (LSE: RM.L - news) : maria.sheahan.thomsonreuters.com@reuters.net; andrea.lentz.thomsonreuters.com@reuters.net)