South Korea's central bank is expected to freeze the key interest rate for the 10th consecutive month for March as the local economy is recovering amid tame inflation, a poll showed Tuesday. All 14 analysts surveyed by Yonhap Infomax, the financial news arm of Yonhap News Agency, forecast that the Bank of Korea (BOK) will leave the benchmark seven-day repo rate unchanged at 2.5 percent on Thursday.