Ensco (ESV), an oil and gas driller, is up 26 cents to $52.58 after Morgan Stanley upgraded the stock to Overweight from Equal Weight today. The firm raised their price target to $80 from $75. 11,000 calls now traded in the name, which is about 10X the day’s put volume. Typical volume in ESV through midday is about 1,800 contracts. The action includes a multi-exchange sweep of 7,000 Aug 52.5 calls at $1.60, which is an opening buyer, according to ISEE data. 8,200 now traded ahead of an Aug 8 (after market) earnings report.