The composite interest rate of Hong Kong was unchanged at 0.37 percent at the end of February, matching its level at the end of January, Hong Kong Monetary Authority said here Wednesday. Both the weighted funding cost for deposits and interbank funds remained steady during the month. The composite interest rate is a measure of the average cost of banks' funds. Data from retail banks, which account for about 90 percent of the total customers' deposits in the banking sector, are used in the calculation.