MM is widely, though decreasingly, used in legacy finance: https://english.stackexchange.com/questions/181917/mixing-use-of-k-for-thousands-and-mm-for-millions

MM is widely, though decreasingly, used in legacy finance: https://english.stackexchange.com/questions/181917/mixing-use-of-k-for-thousands-and-mm-for-millions https://english.stackexchange.com/questions/181917/mixing-us... It’s also used by finance-outsiders who want to look like they are finance-insiders, a bit like how people will casually write GOOG and AMZN instead of Google and Amazon.