A revision to October 2017 data may have amplified a double digit lift in the level of business lending in November. The ABS said on Friday that the seasonally adjusted series for the value of total commercial finance commitments rose 14.7 per cent in November. Impairment charges for Australian banks "are likely to increase this year, with asset quality still being challenged in some sectors and regions," Fitch Ratings said in a commentary at the end of last week. "Loan-impairment charges fell close to record lows in 2017, which is one reason why profit growth held up better than we had expected," Fitch said, adding that: "write-backs from previously impaired assets are likely to fall. Implementation of the Australian equivalent of IFRS9 might also result in higher provisioning charges."