Quote from mcurto:
August 105 calls traded a boatload on the screen today, about 40,000 lots total when everything was said and done. I talked to a local from a fairly good-sized screen MM group and he said the paper was both ways. I'd assume some of that was Wells Fargo convexity hedging (buying) as we downticked, but probably not more than 15,000 or 20,000 (they were long the 106 and did a 1x2 rolling into the long 105 yesterday). The next 20,000 may have been dealers creating synthetic puts by buying calls and selling futures at a 1:1 ratio (heard that scenario from a different screen MM) on the way down. A lot cheaper to create synthetic puts than buy the August 104 puts outright. But I'm not completely sure about the second scenario, have never really seen dealers do synthetic type stuff as of late. The long end will be pushed until some real money type accounts become active in BIGGER size, they are testing the waters, but not enough to stop the move.