Earnings by South Korea's listed companies fell nearly 4.4 percent in 2013 from a year earlier amid the global economic slowdown, data showed Tuesday. The combined net profit of 494 firms listed on the main bourse came to 1,813 trillion won (US$1.71 trillion) on a consolidated basis last year, up 1.84 percent from 1,780 trillion won a year earlier, and their operating income advanced 3.4 percent on-year to reach 60.4 trillion won, according to data compiled by the Korea Exchange (KRX).