Masco (MAS) is seeing bullish trading for a third day. The action started on Wednesday and coincided with news that the company’s chairman disclosed purchases of 300,000 MAS shares between $17.80 and $17.99 a share. Today, the stock is up 4 cents to $18.62 and 9,000 calls have traded, compared to only 29 puts. The October 25s are the most actives. 6,059 have traded, with 100 percent trading on the ask side.