The long bear market in Cray Research Inc’s shares may be over as the most negative of analysts on the supercomputer maker, Stephen Weber of Cowan & Co switched his investment rating on the stock to buy from sell and raised his earnings estimates for next year: the news added $2.75 to the share price at $36.125, having risen $2.25 on Friday; Weber’s 1990 forecast is reportedly for earnings of $4.50 where he had previously been looking for $4 even; the Minneapolis firm did $4.99 a share in 1988.