Nasdaq cautious as volume spike drives first-quarter profit beat

(Reuters) - Nasdaq Inc reported higher-than-expected first-quarter profits on Wednesday, benefiting from market volatility fueled by the coronavirus crisis, but the transatlantic exchange operator also warned of uncertainty ahead.Trading volumes surged as global financial markets were ravaged by the rapid spread of the pandemic in the quarter, leading to a big increase in transactional revenues at Nasdaq.But the environment also presented challenges, with nearly all of Nasdaq's 27 initial..