An advertisement for a mortgage loan hangs in front of a financial institution in Seoul on May 24. [YONHAP]

Banks' household mortgage loan rates fell in April, ending a six-month upward trend, amid tighter regulations aimed at stabilizing the housing market, data showed Friday.

The average interest rate on new bank loans stood at 4.2 percent last month, unchanged from a month earlier, according to the data from the Bank of Korea (BOK).

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The average rate on corporate loans also stayed flat at 4.2 percent, while the rate on new household loans dropped 0.08 percentage point to 4.43 percent.