Costco (COST) is up $1.21 to $46.25, as some of the retailers see gains Thursday following better-than-expected results from Bed, Bath and Beyond (BBBY) and Nike (NKE). In the options market, 23K COST puts traded on the day, which represents about 4X the expected. July 45 puts are being sold, with 20.4K traded and 86 percent hitting bid-side. Some players might be closing out trades opened one week ago when COST July 45 and Jan 40 puts saw increasing buying interest. Read more on recent activity in COST.