NuScale Power (SMR -25.60%) shrugged off the report of a money-losing fourth quarter last week, but it can't quite shake the effects of a Wall Street sell rating. After Wells Fargo downgraded the stock to underweight yesterday, NuScale shares lost 35% -- and they're losing another 23% through 11 a.m. ET on Wednesday.NuScale's (very) recent ups and downsThe producer of small modular nuclear reactors reported horrible earnings last week: Quarterly sales nearly doubled, but quarterly losses were twice as bad a ...