There was discussion last night about the possibility of M being a reference to Marriott since Heather Podesta lobbies for Marriott International:

>>6354563 (pb) M tweets

>>6354813 (pb) Marriott post

TODAY, we have this:

Marriott to Take On Airbnb in Booming Home-Rental Market

https://www.wsj.com/articles/marriott-to-take-on-airbnb-in-booming-home-rental-market-11556535600

Potential stock tip?