Most already know Mt.Gox filed bankruptcy. They even started selling their customers data, and having not to be released would be a btc fee of some sort.
If I can find the page again, I`ll link it here.
They got hit pretty hard over the years, so it shouldnt be a surprise after they lost their merchants like dwolla back in the day.
1st time they got hit was when the US government just swooped in and took chunk of btcs.
Ever since then, I dont feel like they been representing #`s correctly, simply to make back those btc loss.
This guys mentions
http://www.reddit.com/r/Bitcoin/comments/20ba6r/psa_bitcoin_naked_shorts most people should be aware the traits of it on all "so called exchanges".