Net Interest Margins (NIMs) at DBS, OCBC and UOB averaged 1.69% in 4Q14, marginally higher than 1.66% in the year-ago quarter and steady from 3Q14. According to SGX, NIMs may rise in the coming quarters due to a surge in the Singapore Interbank Offered Rate (SIBOR), which could boost profits, though this may be partially offset by slower domestic growth. The increase in SIBOR may be a double …