Legal action against Mr Lewis and Joe Price, BofAâs chief financial officer, has been taken by Andrew Cuomo, New Yorkâs attorney general.
He claimed that the pair deliberately failed to inform shareholders of the financial instability facing Merrill Lynch before a vote on whether BofA should acquire the financial institution in 2009 occurred.
However, lawyers working for Mr Lewis claimed that the case presented by Mr Cuomo was âimplausibleâ and âinconsistentâ.
In the filing, Mr Lewisâ legal team said: âSome have looked to assign blame for every aspect of the financial crisis, even where there is no evidence of misconduct. This case is a product of that dynamic and does not withstand either legal or factual scrutiny."
The papers also described the merger as âan unmitigated financial and strategic successâ for BofA shareholders.
Mr Cuomoâs law suit was originally filed in February of this year.
In previous action taken by the Securities and Exchange Commission, BofA paid a fine of $150 million for failing to make appropriate information available before the acquisition of Merrill Lynch went ahead.
By Jim Ottewill