** Insurance broker Brown & Brown's BRO.N shares rise 4.5% to $70 premarket
** BRO launches a $250 million accelerated share repurchase program with Bank of America BAC.N
** Program part of co's $1.5 billion share repurchase authorization announced in October
** Stocks of insurance brokers have struggled this year on concerns that AI tools could speed up disruption across the sector
** Of 19 brokerages tracking the stock, two rate it "buy" and 17 "hold"; median PT is $83 - data compiled by LSEG
** As of last close, BRO down 16% YTD
(Reporting by Arasu Kannagi Basil in Bengaluru)
((ArasuKannagi.Basil@thomsonreuters.com;))