tag:blogger.com,1999:blog-1520302325239963360.post8524628908021896642..comments2024-01-23T14:04:29.555-08:00Comments on Risk Laboratory: Ophir Gottlieb: HCA Holdings (HCA) - Large Call Buyer is Back Pre-Earnings; OCC OI Error?Ophir Gottliebhttp://www.blogger.com/profile/14504557662647338626noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-1520302325239963360.post-67484691874629718762012-01-19T12:32:01.619-08:002012-01-19T12:32:01.619-08:00OI is open interest -- the total number of open po...OI is open interest -- the total number of open positions held in a specific option netted out for long and short. So long 200 and short 50 yields an OI of 150.<br><br>14,000 options represent 100 fold that many shares. Options expiration is the third Friday of every month -- although now there are quarterly and weekly options available in some issues.Ophir Gottliebhttp://www.blogger.com/profile/02699643319377083669noreply@blogger.comtag:blogger.com,1999:blog-1520302325239963360.post-49628489623506631372012-01-17T15:43:44.855-08:002012-01-17T15:43:44.855-08:00This is fascinating! Can you please explain to a ...This is fascinating! Can you please explain to a derivatives novice looking at this what the following are:<br><br>OI (this must be related to volume traded, right?)<br>OCC (??)<br><br>Just real basic stuff: the HCA Feb 22.5 calls are calls to buy HCA at $22.50? When in Feb do they expire? And how many options does 14,000 positions represent? <br><br>Thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1520302325239963360.post-35487247027600621602012-01-13T12:29:22.014-08:002012-01-13T12:29:22.014-08:00The OI doesn't look real to me. OI is reporte...The OI doesn't look real to me. OI is reported AMC everyday and does NOT update in real-time. There is no such thing as real-time or intraday updating OI. In my opinion, 14,000 positions do not exist in HCA Feb 22.5 calls (until the trading today) and that mark in OI is erroneous from OCC. I believe a similar error was made in those same calls on 1-6-2012 where Oi jumped ~900 with 5 contracts trading the prior day.Ophir Gottliebhttp://www.blogger.com/profile/02699643319377083669noreply@blogger.comtag:blogger.com,1999:blog-1520302325239963360.post-79014087895184376072012-01-13T12:26:31.059-08:002012-01-13T12:26:31.059-08:00But the OI is real, rather than OCC technical erro...But the OI is real, rather than OCC technical error, I didn't get it right. Could you please explain ? ThanksAnonymousnoreply@blogger.com