Almost all bond traders expected the Bank of Korea (BOK) to freeze its key rate this week for the 12th straight session, a survey showed Tuesday.According to the survey of 100 bond traders, conducted by the Korea Financial Investment Association last week, 99 percent of the respondents predicted that the BOK would hold the key rate steady, mainly due to rising volatility in foreign exchange markets.The BOK is set to hold its rate-setting meeting on Thursday.Source: Yonhap News Agency