Commercial banks here have come under criticism for cutting their savings interest rates on a larger scale than those from loan products. According to data from Korea's top five banks - KB, Shinhan, Hana, Woori and NongHyup - the average interest rate for their savings product with a one-year maturity was within a band from 3.36 to 3.6 percent as of Wednesday. This is a drop of more than 1 percentage point from November last year when they promised to offer annual returns of more than 5 percent for their major savings products.