A company obtained a short-term bank loan of $250,000 at an annual interest rate of 6%. As a condition of the loan, the company is required to maintain a compensating balance of $50,000 in its checking account. The company’s checking account earns interest at an annual rate of 2%. Ordinarily, the company maintains a balance of $25,000 in its checking account for transaction purposes. What is the effective interest rate of the loan?