david einhorn. new stakes in research in motion. too little too late if you ask me. anyway. dell and yahoo added. he dumped more stocks than he added. einhorn's green light dumped marathon oil, cvs, becton, dickinson. like i said, i've probably gone through five to ten in the last hour and a half. this is e the first time i've seen rim as a new position through a well-known top 20, if you will, hedge fund manager out there. someone is finally dipping their toes into blackberry bog. >> thanks for t that is interesting. >> in addition to einhorn you've got cooperman that expanded last week. this is cheap stock. upside in an acquisition. if it doesn't get an acquisition, still an installed base. not a lot to lose here. classic value. >> i guess. >> is it a value trap? >> i don't know. i think he usually likes -- when you think about his apple position and what they have in the ecosystem. and rim might be the opposite of that. certainly to their detriment and apple's success. so that's sort of an interesting one. river for him, 3 million shars of rim is 45 million bucks. sounds l

be research in motion on a market share basis today it's getting a pop on the disclosure that david einhornearch in motion. clearly einhorn could have been in and out of this thing by now. >> listen -- >> is this a good thing? >> i would never buy a stock based on the fact that one hedge fund filed a 13-f and is in there. there's a lot of people that are in r.i.m., short r.i.m. einhorn is a great inventostor,t he's made plenty of mistakes. >> that's it for us on "squawk on the street," i'll see you at 5:00 for "fast money," we've got t. boone pickens. don't go anywhere, the "fast money" halftime report begins right now. >>> four hours to go until the close. this is where we stand, we're at a seven-month high on the s&p and gaining, 1354. was the level we breached few moments ago. apple continues its upward

a day after we learned that david einhorn is loading up on the company. who's right? we've got the trades and some home builders hit new highs, should you buy or will you get caught in the seasonal selloff? >>> welcome to the "fast money" halftime report. let's get to the trades, starting with apple. on fire today. surging and it's not just the stock. check out the options, if you bought apple $530 calls last night, you're sitting on a 400% profit today. john nejarian is on the phone with an incredible options trade. >> that's right. that was just in the first hour of trading today. those options have now run almost 700% today. the options trading up to $5.20 from 68 cents, which means a $68 investment brought you $520 today. that's part of the reason, simon, that the options are wagging the dog. i mean they are the derivative of course, but they are wagging the dog in apple. we show right now about 490,000 calls changing hands. most of those in the weeklies, with which are the options that expire just this friday. and so when you see that much volume changing hands,

. >> interesting people talked about dell because of david einhorn this week, so now if you just carry that out a little bit further, people are coming from $14 up to $18 and change now, so, what's good for this refresh cycle is as adam just said you good for ibm and also good for dell and good for hewlett. >> the question with the new mack operating system due to be launched, the mountain lion being known now, tim, i know you have done -- >> that was his nickname in college, too. >> snow leopard. but i mean, i think that these guys are in a great place. i would just -- what's interesting about microsoft, could be having the same conversation two days ago about am, the conversation we had when apple had the intraday. the valuation is very attractive, a company i think actually, based upon -- easy comps for 2013, a place it could continue to outperform the refresh cycle, the early previews on windows 8, this is a much less bug-filled enterprise than we saw with windows 7. i think a lot of great news, guy's making a very good point here. some point you saw it wasn't as dramatic as a well