Reuters:

Facebook Inc (FB.O) has asked large U.S. banks to share detailed financial information about their customers, as part of an effort to offer new services to users, The Wall Street Journal reported on Monday, citing people familiar with the matter.

The financial information asked from the banks include card transactions and checking account balances, according to the report.

The promise they won't use the data to target ads or share it with third parties. I guess next they'll want all your health care info so they can recommend treatments and whatnot.