1 Sibor: Singapore Interbank Offered Rate and is a daily reference rate based on the interest rates at which banks offer to lend unsecured funds to other banks in the Singapore wholesale money market (or interbank market)
SOR:Swap Offer Rate (SOR) is SIBOR plus lending costs incurred by the banks. It is as transparent as SIBOR that reflects market conditions. If your loan is based on the 3-month SOR, your interest rate will be 3-month SOR plus a margin for the Bank and repriced every 3 months.
Swap offer rate and Singapore Interbank Offered Rate are fixed by the Association of Banks in Singapore.