{"id":219862,"date":"2025-03-12T11:57:46","date_gmt":"2025-03-12T15:57:46","guid":{"rendered":"https:\/\/ibkrcampus.com\/campus\/?p=219862"},"modified":"2025-03-31T10:33:57","modified_gmt":"2025-03-31T14:33:57","slug":"what-is-option-open-interest-and-how-to-analyze","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/podcasts\/ibkr-podcasts\/what-is-option-open-interest-and-how-to-analyze\/","title":{"rendered":"What is Option Open Interest and How to Analyze"},"content":{"rendered":"\n<p>Market Chameleon\u2019s Dmitry Pargamanik &amp; Will McBride join IBKR\u2019s Jeff Praissman for an in depth look at Open Interest and how it can be used by traders and investors when analyzing options.<\/p>\n\n\n\n<iframe title=\"What is Option Open Interest and How to Analyze\" allowtransparency=\"true\" height=\"150\" width=\"100%\" style=\"border: none; min-width: min(100%, 430px);height:150px;\" scrolling=\"no\" data-name=\"pb-iframe-player\" src=\"https:\/\/www.podbean.com\/player-v2\/?i=c9a73-1868d4f-pb&#038;from=pb6admin&#038;share=1&#038;download=1&#038;rtl=0&#038;fonts=Arial&#038;skin=1b1b1b&#038;font-color=ffffff&#038;logo_link=episode_page&#038;btn-skin=c73a3a\" loading=\"lazy\"><\/iframe>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-summary-ibkr-podcasts-ep-234\">Summary \u2013 IBKR Podcasts Ep. 234<\/h2>\n\n\n\n<p><em>The following is a summary of a live audio recording and may contain errors in spelling or grammar. Although IBKR has edited for clarity no material changes have been made<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Hi, everyone. My name is Jeff Praissman with Interactive Brokers, and we&#8217;re here at the podcast studio with Market Chameleons, Demetri Pargamanik and Will McBride. Hey, guys, how are you?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Hey.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-will-mcbride-nbsp\"><strong>Will McBride<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Thanks for having us.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-0\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Always my pleasure\u2014love having you guys swing by for our monthly podcast. You just put on a great webinar on option open interest, and I&#8217;m excited to have you in the studio so we can continue the discussion for our listeners.&nbsp;<\/p>\n\n\n\n<p>So I want to start off with the basics, right? We&#8217;re going to talk about open interest\u2014what exactly is options open interest?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-0\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Yeah, options open interest is something that is calculated by the Options Clearing Corporation. What it does is different from volume\u2014it shows us the options that are still open, meaning there are positions out there that have yet to close out, get exercised, or expire.&nbsp;<\/p>\n\n\n\n<p>So these are open positions that exist right now in the market.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-1\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>I think that&#8217;s a good point. I think people may sometimes confuse open interest with volume. So how exactly is open interest calculated? Is it something that&#8217;s done in real time, or how often is it calculated?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-1\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>We get that question a lot\u2014whether you can see open interest in real time. But the way open interest is calculated is that it\u2019s actually done overnight by the Options Clearing Corporation based on end-of-day settled trades. It also takes into consideration any type of corporate actions, exercises, or expirations.&nbsp;<\/p>\n\n\n\n<p>So it&#8217;s not something we can see in real time. It doesn&#8217;t get reported like a trade does in real time by the options exchange. When you see a trade, it gets executed and then reported to the OPRA feed\u2014the Options Price Reporting Authority. However, open interest is a little different.&nbsp;<\/p>\n\n\n\n<p>That\u2019s handled by the OCC, which goes through a reconciliation process overnight, and then they make the new open interest available the following day.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-2\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>And just to further clarify for the listeners\u2014essentially, if a thousand option contracts trade and both sides are opening, then open interest would increase by a thousand. But if a million contracts trade\u2014this is obviously an extreme example\u2014and one side was opening while the other was closing, the open interest would stay the exact same, correct?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-2\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Yeah. There are a lot of scenarios where people get confused because they try to compare volume with the change in open interest. But because of the way they\u2019re calculated, you&#8217;re exactly right\u2014we could have a lot of volume with no change in open interest, or we could have a lot of volume and then see open interest go down to zero because positions are closing or getting exercised at the end of the day.&nbsp;<\/p>\n\n\n\n<p>Or, you could have volume that is much higher than the change in open interest. For example, let\u2019s say in the morning, two sides are opening, and later, in the same option, one side is closing while a different party is opening. The volume will go up, but let\u2019s say this happens with 10 contracts\u2014two trades of 10 contracts each.&nbsp;<\/p>\n\n\n\n<p>The open interest would only go up by 10 because the second transaction was just someone transferring their position to a different party, not necessarily opening a new position.&nbsp;<\/p>\n\n\n\n<p>So it\u2019s very important to understand how that works, especially when analyzing volume and the subsequent change in open interest.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-3\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>That kind of leads me to my next question\u2014why is open interest important? In that example, a million contracts could trade, and the open interest stays the same. That\u2019s an extreme case, but why is open interest important?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-3\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Open interest tells us how much of the previous day&#8217;s volume converted to new positions\u2014new risk. Did new positions increase? Did they decrease based on the previous day&#8217;s volume?&nbsp;<\/p>\n\n\n\n<p>We could have a lot of volume, but if the open interest really stayed the same, then there\u2019s no real increase in that particular option. That\u2019s the insight you get from open interest.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-4\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Is there a maximum limit to open interest?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-4\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Yeah, there is. Every security has a different limit, but a limit is established because options are a derivative. You need to have a certain amount of stock available to create options, right? You can&#8217;t create unlimited options on a limited supply of stock.&nbsp;<\/p>\n\n\n\n<p>So there is a cap on how many options contracts can be open on a particular security. It makes sense\u2014if there were only 100,000 shares of stock outstanding, you wouldn&#8217;t be able to create options on a million shares of stock. So there&#8217;s definitely an established limit on open interest.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-5\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>And, with all the great conversations the three of us have, it always comes down to: how do we utilize whatever subject we\u2019re talking about?&nbsp;<\/p>\n\n\n\n<p>Since we\u2019re always talking about options, how is this information or data used by investors and traders? What are some ways open interest is used?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-5\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>There&#8217;s really no single way\u2014investors use it differently, mainly to gain insights into the markets.&nbsp;<\/p>\n\n\n\n<p>One way is to assess the liquidity of an option. When looking at a particular option, you want to determine how liquid it is\u2014how much trading activity and how many positions are being carried. One way to do that is by looking at open interest.&nbsp;<\/p>\n\n\n\n<p>If an option has zero open interest, there are no open positions, and maybe that option is less liquid. Price discovery might also be more uncertain. But if there\u2019s a lot of open interest, it could indicate that the option is more liquid, with better price discovery and a clearer sense of fair value.&nbsp;<\/p>\n\n\n\n<p>So that\u2019s one way open interest provides insight\u2014just by observing it.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-6\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Can investors and traders also use open interest to gauge market sentiment?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-6\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>One way to try to assess market sentiment is to compare open interest relative to its history. If open interest is climbing or relatively high, then there&#8217;s more activity or interest in the stock than usual\u2014more betting, more risk-taking in a particular security.&nbsp;<\/p>\n\n\n\n<p>Sometimes, we\u2019ll see that around events, which could explain why open interest is increasing. For example, around earnings, you\u2019ll typically see an uptick in volume and an increase in open interest. But there could be other reasons as well, and that can be a way to measure trader sentiment around a stock.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-7\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Are investors able to use open interest as an indicator for support and resistance?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-7\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>You may be able to use it as a reference point. The thing with open interest and options is that you have different strikes available. Unlike futures, where you have a single price level, with options, you have at-the-money strikes, out-of-the-money strikes, and further out wings and tails.&nbsp;<\/p>\n\n\n\n<p>By observing where there\u2019s a concentration of open interest and at which strikes, it may help assess where traders are targeting\u2014what range of strikes they are focusing on. If there\u2019s large outstanding open interest on a particular strike, that could certainly influence trading activity because it creates hedging needs.&nbsp;<\/p>\n\n\n\n<p>When there\u2019s a significant position at a strike, traders may need to rebalance their risk, which can create more trading activity around certain inflection points.&nbsp;<\/p>\n\n\n\n<p>And, as in all our conversations, it comes back to analyzing data\u2014how it can be used in the real world for trading strategies. What are some ways traders and investors can utilize open interest for trading strategies?&nbsp;<\/p>\n\n\n\n<p>Open interest itself is not a strategy in the way that, say, a call spread is a trading strategy. You can buy and sell, but open interest is more about the information surrounding an option. However, that information can be very useful.&nbsp;<\/p>\n\n\n\n<p>For example, professionals like market makers use it frequently. You\u2019re aware of strategies like capturing dividends on the ex-date, or early exercising deep in-the-money American-style options like puts. At a certain point, it makes sense to exercise early, but if a trader is inefficient and doesn\u2019t exercise, others may exploit that by finding open interest and executing a carry trade in deep in-the-money options.&nbsp;<\/p>\n\n\n\n<p>Another example is pin risk at expiration. If there\u2019s a lot of open interest on a strike towards the end of the day, traders may anticipate potential order flow and adjust accordingly.&nbsp;<\/p>\n\n\n\n<p>If you see very high open interest before an earnings event and then earnings are announced, you can infer from historical patterns that order flow will likely start to unwind as traders take risk off. Open interest can help anticipate or infer how much order flow may need to exit once the event is over\u2014typically, there\u2019s a \u201crisk-off\u201d move post-event.&nbsp;<\/p>\n\n\n\n<p>These are some of the ways people look at open interest to gauge what others are doing\u2014where they\u2019re targeting, whether they\u2019re in short-dated or longer-dated options, whether they\u2019re focused on calls or puts.&nbsp;<\/p>\n\n\n\n<p>Open interest itself also needs deeper analysis. You need to go back and examine what type of trading caused the increase in open interest.&nbsp;<\/p>\n\n\n\n<p>For example, an increase in open interest could be due to simple buying and selling of an option. But it could also be from a large spread trade, where someone is buying one option and selling another as part of a strategy. That tells you something different\u2014it wasn\u2019t just speculation on a single option but rather part of a structured trade.&nbsp;<\/p>\n\n\n\n<p>So it\u2019s important to investigate: How did we get to this point? Was it a single big trade? Was it part of a broader strategy? These details matter.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-8\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Pretty much, like with most things we talk about, open interest is just another tool in the toolbox.&nbsp;<\/p>\n\n\n\n<p>You have to look at multiple data points and extrapolate intelligent relationships between them to get a clear picture. You can&#8217;t just look at open interest. You can&#8217;t just look at volume. You can&#8217;t just look at volatility. You can&#8217;t just look at spreads or lack of spreads.&nbsp;<\/p>\n\n\n\n<p>You have to take everything into account\u2014the who, the how, the what, the why\u2014right?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-8\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Yeah. To answer more questions and become more informed.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-9\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>And again, just to emphasize for our listeners, especially those newer to the options market: open interest and volume are very different things.&nbsp;<\/p>\n\n\n\n<p>The absolute volume of trading is a very different data point from open interest. They are related, of course, but they\u2019re not the same\u2014it\u2019s not apples to apples.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-9\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Exactly. You need to understand the differences, because if you don\u2019t, you won\u2019t get the right insight from open interest.&nbsp;<\/p>\n\n\n\n<p>Like I said, a lot of people assume open interest is calculated in real time or that it directly correlates to volume. But it doesn\u2019t\u2014volume does not translate into a direct one-to-one correlation with open interest.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-10\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Are there any final thoughts you\u2019d like to leave our listeners with regarding open interest or anything trading- or options-related?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmitry-pargamanik-nbsp-10\"><strong>Dmitry Pargamanik<\/strong>&nbsp;<\/h3>\n\n\n\n<p>For investors interested in trading, risk assessment, and getting deeper insights into the options market, I\u2019d encourage them to learn about open interest. Understand what it means, what it can indicate, and analyze it even from a historical perspective.&nbsp;<\/p>\n\n\n\n<p>For example, ask: Are we at a relatively high level of open interest? Are we at a low level? What does that mean?&nbsp;<\/p>\n\n\n\n<p>And once you identify those levels, check implied volatility and other factors to paint a clearer picture of the market you\u2019re trading.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-11\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>This is great. Dmitry, Will\u2014thank you.&nbsp;<\/p>\n\n\n\n<p>Again, I\u2019d like to remind everyone that we do a monthly podcast with Market Chameleon. We also host a monthly webinar, and Dmitry and Will were kind enough to stop by afterward to do a deeper dive into this subject.&nbsp;<\/p>\n\n\n\n<p>If you missed the webinar, you can visit our website, go to the education section, click on webinars, and find previously aired sessions. You can also go to the contributors section, click on Market Chameleon, and access all the great podcasts and webinars we\u2019ve done together.&nbsp;<\/p>\n\n\n\n<p>And just a reminder\u2014the podcasts are available on Spotify, Amazon Music, and all the usual platforms, as well as our website.&nbsp;<\/p>\n\n\n\n<p>Dmitry and Will also do a great YouTube show every trading day morning at 9 a.m., right before the market opens.&nbsp;<\/p>\n\n\n\n<p>Right, guys?&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-will-mcbride-nbsp-0\"><strong>Will McBride<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Yep. 9 a.m.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-jeff-praissman-nbsp-12\"><strong>Jeff Praissman<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Great. Thanks, guys\u2014I appreciate it.&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Market Chameleon\u2019s Dmitry Pargamanik &amp; Will McBride join IBKR\u2019s Jeff Praissman for an in depth look at Open Interest and how it can be used by traders and investors when analyzing options.<\/p>\n","protected":false},"author":111,"featured_media":219870,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"footnotes":""},"categories":[10842,13857],"tags":[18946,1383,18944,4574,18945,18053],"contributors-categories":[13576,13788],"class_list":{"0":"post-219862","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-ibkr-podcasts","8":"category-podcasts","9":"tag-liquidity-analysis","10":"tag-market-sentiment","11":"tag-option-open-interest","12":"tag-options-trading","13":"tag-support-and-resistance-levels","14":"tag-trading-strategies","15":"contributors-categories-interactive-brokers","16":"contributors-categories-market-chameleon"},"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.3) 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