Citi options having their busiest day of the year, with 2.84million contracts trading by 2pm and the stock making up 28% of the US listed single stock option volume today. Over 2million calls have traded, with a buyer of nearly 100,000 May 5 calls in the early afternoon for 59 to 64cents possibly positioning for continued upside hrough Friday’s earnings and into next month. Total call and put OI at the June 5 strike is more than 3million contracts, largely built up as pros have shorted June 5 synthetics against preferred shares. Adjustement of these positions is likely to keep C a US volume leader for the immediate future.