** Shares of blockchain company LFIN.O down 18.92 pct at
$48.06 premarket, on a tweet from short-seller Citron Research
** Stock is among top pct losers on the Nasdaq
** Citron alleges LFIN to be a "pure stock scheme" and that
their filings and press releases are "riddled with inaccuracies
and fraud" (https://bit.ly/2Gh2lAu)
** Longfin among companies that jumped astronomically on the
cryptocurrency wave late last year
** Bitcoin BTC=BTSP trading down ~3 pct at $7909.49 on the
Luxembourg-based Bitstamp exchange
** Through Monday's close, Longfin stock had risen 2.3 pct
so far this year, vs Overstock.com's OSTK.O 30 pct fall
(Reporting by Nikhil Subba in Bengaluru)
((Reuters Messaging:
Nikhil.Subba.thomsonreuters.com@reuters.net))