** Shares of cryptocurrency and blockchain-related stocks
jump in premarket trading after bitcoin BTC=BTSP jumps 7% to
hit a near 1-1/2 year high of $12,615
** Ethereum's ether ETH=BTSP hovers at 10-month high
** Blockchain company Riot RIOT.O up 11.5%, currency miner
Marathon Patent MARA.O 5%, internet shopping company
Overstock.com OSTK.O 3%
** Xunlei Ltd XNET.O advances 5%
** Bitcoin has more than tripled in value this year and is
now ~56% away from its all-time high hit in 2017
(Reporting by Amy Caren Daniel in Bengaluru)
((Reuters Messaging:
Amy.CarenDaniel.thomsonreuters.com@reuters.net))