China has surprised investors by deciding not to cut an important interest rate that influences mortgages, in a move that economists say will make it tough to revive confidence in the country’s troubled real estate sector which has dragged down prospects for the world’s second largest economy.

The People’s Bank of China (PBOC) kept its five-year loan prime rate (LPR), which stands at 4.2%, on hold on Monday, while trimming its one-year loan prime rate by 10 basis points from 3.55% to 3.45%.

The cut to the one-year rate was widely expected, but the lack of action on the five-year rate was not. Nearly all of the analysts polled by Reuters had predicted that the five-year rate, which serves as the mortgage reference rate, would be reduced by at least 15 basis points.