IndyMac Bancorp Inc. said late Tuesday that it sold $335 million of mortgage loans on April 1 in a private securitization, resulting in a $2 million pretax loss.

The Pasadena-based lender said on its blog Tuesday night that the mortgage-backed securities consisted of about $235 million of AAA rated bonds, which yield 1.65 percentage points above the London interbank offered rate. The rest were a mixture of prime jumbo and Alt-A hybrid adjustable-rate mortgages.

This is the company’s first non-agency mortgage securities sale in two months. IndyMac didn’t identify the source of its loss.

“Other investors have expressed similar interest in these types of bonds, so we will continue to pursue these transactions as a key part of our balance sheet reduction/capital generation strategy,” company spokesman Grove Nichols said in the post.

The parent of IndyMac Bank, which posted a $509 million fourth-quarter loss in February, said the transaction is part of the company’s effort to reduce its balance sheet and raise capital.

IndyMac said the loans were priced at about 99.7 cents on the dollar, compared with a book value of 100.3 cents on the dollar.

Shares in IndyMac were off only 1 cent to $4.60 in trading Wednesday morning.