The SPDR Homebuilders ETF (XHB) is seeing bullish order flow early after a player stepped in to buy a 4,200 lot of October 19 calls. Open interest is those calls is 135 contracts, suggesting today’s volume is a new position. The fund, which holds shares of 21 different housing and homebuilding companies, is down 24 cents to $17.81 today and off 7.5 percent this week. However, XHB is also nearly 30 percent above a 52-week low of $13.81 set a little more than one month ago.