US stocks opened with modest gains on Friday as Wall Street wrapped up the last trading session of November on a shortened post-Thanksgiving schedule.The S&P 500 rose 0.2 per cent, the Dow Jones Industrial Average added 66 points, and the Nasdaq gained 0.4 per cent. Coinbase Global climbed 2.2 per cent as Bitcoin traded above $92,000. Large tech names advanced, with Alphabet up 1.8 per cent and Micron Technology rising 2.1 per cent, although Oracle slipped 3 per cent, AP reported.Trading closes early at 1 p.m. ET after Thursday’s holiday.Earlier in the day, futures trade was halted for hours due to a technical outage at a CyrusOne data centre affecting the Chicago Mercantile Exchange. After the issue was resolved, Dow, S&P 500 and Nasdaq futures resumed with 0.2–0.3 per cent gains. CME said single-stock futures were not affected.Coinbase rose 2.7 per cent in premarket trade as Bitcoin held above $91,000, while Alphabet gained 1 per cent.The S&P 500 is attempting to avoid its first monthly decline since April, coming into Friday’s session down just 0.4 per cent for November after a four-day winning streak.European markets posted mild gains, with Germany’s DAX, Britain’s FTSE 100 and France’s CAC 40 all up 0.2 per cent. Traders awaited eurozone inflation numbers due later in the day.In Asia, Japan’s Nikkei 225 closed 0.2 per cent higher after data showed a surprise rise in housing starts and steady core inflation in Tokyo. South Korea’s Kospi fell 1.5 per cent after a sharp drop in industrial output. Hong Kong’s Hang Seng slipped 0.3 per cent, while Shanghai’s Composite edged up 0.3 per cent.Brent crude dipped to $62.70 a barrel, while US crude rose to $58.91.