Goldman Sachs Group Inc.’s profit fell nearly 13 percent and missed expectations on Tuesday as a less volatile equity market hurt trading business and dampened a bumper year for deals, sending the shares of Wall Street’s premier investment bank down 4 percent. Bank earnings have been hurt this quarter by weak trading volumes as the Federal Reserve slowed the pace of its asset purchases after an 18-month period in which it pumped liquidity into capital markets to ease the impact of the COVID-19 pandemic. Goldman’s trading unit reported a lower profit in the fourth quarter compared to a year earlier as a more stable economy resulted in fewer swings in financial markets. Its revenue from the global markets business, which houses the trading business and accounts for roughly a third of the bank’s overall revenue, fell 7 percent to nearly $4 billion, owing to weakness in both equities and fixed …