more on nxxt trades, page-5

Sorry, in case you didn't know, a cross trade is;

This also occurs when a broker executes both a buy and a sell for the same security from one client account to another where both accounts are managed by the same portfolio manager.

http://www.investopedia.com/terms/c/crosstrade.asp#axzz1lBiMeksA

AND

It could also be a broker transferring stock between their own accounts, rather than their clients