RE: dec and mtb buying That would be my suspicion as well. Any number of reasons they held off buying on Friday......possibly:
(1) they have hit their desired position size and are done for now
(2) they know significant news is about to be released and they are hoping to avoid being investigated for insider trading
(3) they are letting the market take a breather in hopes the stocks pullback a bit so that they can buy at a lower price
(4) unknown