BNK Banking Corporation (ASX:BBC) has bought $150M worth of high-margin residential mortgages from a warehouse financed by Goldman Sachs.

The bank says the transaction will increase its loan book by 13% to $1.3B and increase the Net Interest Margin (NIM).

It is also expected to be revenue accretive for the bank and help them achieve their goal of delivering a positive cash NPAT in Q423.

Following the announcement, shares of BNK Banking Corporation were unchanged at $0.41.