coinbase btcusd bought up and over bitfinex. bitfinex did not sell down to coinbase.
this shoots the theory of "binance turned off withdrawals so they could sell the premium on bitfinex" in the face.
all these are not suppose to exist though according to said theories on the evils of bitfinex.
(NYC blockchain week is also 5/11 - 5/17)
people reported latent buys or buys not executing on bitstamp during this period.
this is a symptom of a known queuing to their matching engine during volatile markets. (market buys executing up to 11minutes later.)
bitfinex was late to the party on the sell which resulting in some premium occurring. there just arent that many active traders willing to sell currently.
(as seen in outflows from bitfinex's hot wallet)