"However," he noted, "until we have a meaningful repurchase experience with these counter parties, we believe it is not possible to reasonably estimate this exposure." All told, Bank of America estimates that it has $4.4 billion in buyback liabilities as of Sept. 30. Its reps & warranties provision stood at $872 million, down sharply from the $1.2 billion from the second quarter but elevated from the $500 billion range it had been in previous quarters. Noski warned that as the buyback saga continues, that number could remain "lumpy" in the quarters ahead. -- Written by Lauren Tara LaCapra in New York. >To contact the writer of this article, click here: Lauren Tara LaCapra. >To follow the writer on Twitter, go to http://twitter.com/laurenlacapra. >To submit a news tip, send an email to: firstname.lastname@example.org.