Bank of America's involvement in the potential divestment deal of British American Tobacco's stake in ITC Ltd could have a neutral impact on BAC's stock in the short term. While advisory roles in significant transactions can enhance a bank's reputation and generate fees, the direct impact on the stock price from such news is typically limited.

The news of BAT planning to sell part of its stake in ITC Ltd could have a neutral to slightly positive impact on BTI's stock in the short term. The divestment could be seen as a move to unlock capital and potentially return value to shareholders. However, the impact is considered neutral due to the lack of details on the use of proceeds and the market's mixed reactions to divestitures.

Citigroup's involvement in the discussions for the potential divestment of British American Tobacco's stake in ITC Ltd is expected to have a neutral impact on Citigroup's stock in the short term. Similar to Bank of America, while such deals can be beneficial for the bank's advisory business and fee income, they generally do not have a significant immediate impact on the bank's stock price.