It's a traditional financial notation for million. Some discussion about its origins here [1][2] [1] http://english.stackexchange.com/questions/149190/what-is-

It's a traditional financial notation for million. Some discussion about its origins here [1][2] [1] http://english.stackexchange.com/questions/149190/what-is-the-correct-abbreviation-for-millions-billions-and-trillions-in-a-finan http://english.stackexchange.com/questions/149190/what-is-th... [2] https://www.reddit.com/r/answers/comments/2sd9bm/why_do_people_abbreviate_million_as_mm/ https://www.reddit.com/r/answers/comments/2sd9bm/why_do_peop...