Bloomberg The holiday-shortened week started with gains in stocks amid a broad advance that saw a continuation of the bullish momentum on Wall Street. Oil and gold rallied as the dollar fell. Equities erased their December losses, with the S&P 500 set for an eighth straight up month - the longest winning run since 2018. Over 400 of its shares rose as the gauge approached a record. Tesla Inc. and Nvidia Corp. led megacaps higher. A gauge of smaller firms climbed 1.5%. Most Read from Bloomberg Photograp ...