Fake trading volumes on coinsmarketcap is a big problem. The administration of coinsmarketcap try to solve this problem that information will be more true.
And what kind of action do they take for this now?
Coinmarketcap can only report what volumes comes from API exchange. No way they have any chance to decide what are fake volumes and true volumes. I think we're, users should know and avoid bad exchange that has shady volume.