Large South Korean firms' ability to service their debts worsened sharply in the first half of 2023 amid falling profits and soaring interest costs, a corporate tracker said Tuesday. The interest coverage ratio for 347 out of the country's top 500 companies by sales averaged 1.16 as of end-June, down 74 percent from 4.42 a year earlier, according to the Leaders Index. The ratio is obtained by dividing a com...