Stringent lockdowns to prevent the spread of Covid-19 weighed heavily on Europe’s economy in the second quarter, causing a record contraction more severe than experienced by the U.S., but analysts said the continent’s success so far in avoiding a resurgence of the disease coupled with aggressive government stimulus should help support a nascent recovery. The eurozone’s gross domestic product fell 40.3% on an annual basis, far exceeding the 32.9% contraction in the U.S. economy over the same period, according to…