By Dan Weil Second-quarter bank earnings reports likely won’t be so hot, but then the outlook improves, Wells Fargo analysts said. Bank stocks have struggled so far this year, with the KBW Nasdaq Bank stock Index dropping 25%. Second-quarter earnings reports likely won’t be so hot, said Wells Fargo analysts, led by the renowned Mike Mayo. But the second half of the year and next year look better, they wrote in a commentary. They reduced second-quarter earnings estimates due to weak capital market revenue and loss reserve buildups. “Thereafter, banks should benefit from the start of the best fo…