Sundaram Finance has announced a 25 basis points downward revision in interest rates on deposits from October 16. Fixed/ cumulative deposits for 12, 18, 24 and 36 months will fetch interest at the rate of 8.25 per cent per annum (previously 8.5 per cent). Similarly, the interest rate for senior citizens stands reduced to 8.75 per cent from 9 per cent for all tenors.