Bitfinex altered the regular offer/demand equilibrium by tweaking the trading algorithm, it was granted that market, by means of someone more clever than them, found a way to exploit it. They also declared they're constantly changing it, i guess out of fear, but it seems market is adapting faster than they could handle.
In another thread (
https://bitcointalksearch.org/topic/m.8335904) i guessed that August could be the right month to perform a cheap(er) manipulation.
But a question now arise, who actually have:
- the statistical knowledge to determine the right moment to perform (which include near perfect market statiscal mapping and geolocalization of users and their trading habits)
- a valid reason to do it
- the economic power to perform
My guess is another exchange, or a cartel of them.