Two major public sector lenders, State Bank of India, and Punjab National Bank hiked their fixed deposit rates by up to 75 basis points. PNB also increased its base rate — below which banks can't lend to 8.5 per cent. SBI, however, left its base rate unchanged, at 7.5 per cent. The new rates will be effective from today. Last month, SBI had raised its benchmark lending rate by 50 basis points, and deposit rates by up to 150 basis points.