Small Trades9 Aug 2013 11:34
From what I understand those really small trades can be found when an MM puts through a big trade but doesn't have enough to fill in one block so say someone buys a million but they have only 999990 left in a particular block then it goes through in 2 trades, one being just '10 shares'. So only MM's can put through those small trades, but saying that I have seen them appear suspiciously timed just before RNS's or changes in trend so could well be a traditional way that MM's communicate with each other on a quick & basic level.