$DJIA(.DJI)$swings to record heightsMarkets took some early strength from U.S. jobless claims figures, which eased to near their lowest levels since the coronavirus pandemic was declared at the end of January 2020.DJI hit a new record high [得意] on encouraging new data, while President Joe Biden is getting set to sign the Covid stimulus.Economists expect claims to ease as the economy reopens, with the increasing availability of coronavirus vaccines helping to provide a tailwind. [暗中观察] Since the pandemic began a year ago, the lowest figure for weekly jobless claims was 711,000 in November.Tech stock Tesla hit top gear again on Thursday. It was up around 3%. Microsoft stock is in a buyafter turning in gain of 2.6%.With the signing