19800/13000 BLDR MAY 16/12 call spreads went up in 2 blocks on the ARCA. 

Shares of Builders FirstSource, Inc (BLDR) are up .46 to 11.25. BLDR is near the middle of the 52 week range.

• Paper traded 19800/13000 BLDR MAY 16/12 call spreads for .30 and .80  
• The ADV is 236 contracts. 
• The open interest is 31798 and 23096 contracts.

The volume went up in 2 blocks on the ARCA. This spread appears to be a closing trade on a little upside pop in BLDR. There is substantial open interest on the trade in a very lightly traded name. From the opening prices it appears the investor is getting out for a scratch if they indeed bought the slight ratio spread first.

• IV 30 is trading for 44%. 
• HV10 is trading for 29%. 
• IV 30 is above the HV 10.

Builders FirstSource, Inc. is a supplier and manufacturer of building materials, manufactured components and construction services to professional contractors, sub-contractors and consumers.