Hong Kong commercial banks may see an exodus of second-tier customers to cheaper funding sources on capital markets towards the end of the year, according to analysts.
The comments follow the latest cut to interest rates this week, which has taken the cost of funds to banks - or rates paid on their deposit accounts - close to zero.
This may put the brakes on further cuts to lending rates and make bond markets appear increasingly attractive to second-tier borrowers.
Savings deposit rates were cut to 0.25 basis points in the latest move and banks have said they were unwilling to see zero rates in Hong Kong.
That means any further cuts to lending rates priced off prime - reduced to 5.25 per cent on Wednesday - will have to come at the expense of the interest spread between the two. The outlook is for further cuts to United States rates.
Analysts say the best of blue-chip borrowers in Hong Kong typically pay a narrow spread above interbank rates on bank loans rather than have the loans priced off prime.