** Shares of coal company Arch Resources ARCH.N jump 20%
at $157.59
** Co posts Q1 profit vs year-ago loss
** Co says it capitalized on historically strong coking coal
pricing
** ARCH expects global supply constraints as significant
driver in buoyant coking coal markets
** Says significant uncertainty continues surrounding
Russian metallurgical coal exports, which constitute roughly 15%
percent of the seaborne market
** "Even after a sustained period of high pricing, global
coking coal supply continues to lag due to a combination of
operational and logistical challenges along with years of
under-investment" - Arch Resources
** ARCH up 71% so far this year
(Reporting by Arunima Kumar in Bengaluru)
((Arunima.Kumar@thomsonreuters.com; Twitter: https://twitter.com/Aru_Kumar94))