** Shares of semiconductor testing company Aehr Test Systems AEHR.O climb 8.5% to $54.5 premarket
** AEHR reports Q3 adjusted loss per share of 5 cents, says effective backlog of more than $50 mln at the end of quarter is company's highest ever
** Analysts' on average estimated a loss of 7 cent per share - data compiled by LSEG
** Firm reports Q3 bookings of $37.2 million, expects second-half bookings to be on the high end of the $60 million -$80 million range previously stated
** Reports Q3 revenue of $10.3 million, down from $18.3 million a year ago and below average analysts' estimate of $10.85 average
** As of last close, AEHR shares up more than 150% YTD
(Reporting by Shashwat Chauhan in Bengaluru)
((Shashwat.Chauhan@thomsonreuters.com))