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Use this report to see significant open interest changes by option contract on the marketplace. These changes can often indicate notable activity in the underlying stock, including whether traders are willing to accumulate long or short option positions, or if they are trying to get out of their long positions quickly. Use the filters on that table as well, to narrow by technical indicator, option price, or whether the symbol is held in an ETF or your custom Watchlist.

To learn more about Open Interest, click here.

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Underlying Details | Option Details | Relative Values | Previous Day Volume | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|

In My Watchlist | Stock Price | Option Type | Expiration | Open Interest Chg | OI Chg % of Prev Volume The change in option open interest, expressed as a percentage of the underlying symbol's option volume from the previous day. | ||||||

In ETF | Price % Chg | Option Price | Option IV | OI Chg % of Avg Volume The change in option open interest, expressed as a percentage of the underlying symbol's average daily option volume. | Option Volume | ||||||

Sector | Stock Type | Option Price Chg | Option IV Chg | Volume as % of Und Avg The option's volume, expressed as a percentage of the underlying symbol's total average daily volume | # Trades | ||||||

Industry | Earnings Date | Option Volume | Option Delta | OI as % of Total OI The option's open interest, expressed as a percentage of the underlying symbol's total open interest. This will show a concentration of open interest on any one particular option. | % Single-Leg | ||||||

Avg Und Opt Volume | OI Shares % of Avg Stock Volume Equivalent Shares is the number of shares of stock required to exercise the entire open interest position at once. Usually, this is equal to open interest x 100, as each option contract (typically) covers 100 shares. Then, we take the equivalent shares and express it as a percentage of the underlying symbol's average daily stock volume. | % Multi-Leg | |||||||||

% Contingent |

Underlying Details | Option Details | Option Statistics | Option Open Interest * | Previous Day Volume | Total Open Interest * | Equivalent Stock Volume | |||||||||||||||||||||||
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Underlying Symbol |
Stock Price |
% Chg | Avg. Underlying Option Volume |
Option Expiration |
Strike | Type | Option Price |
Change | IV | % Chg | Volume |
Volume as % of Avg Und Volume The option's volume, expressed as a percentage of the underlying symbol's total average daily volume |
Open Interest |
Change | % Chg |
OI Chg as % of Avg Volume The change in open interest, expressed as a percentage of the underlying symbol's average daily option volume |
Indicator |
OI Chg as % of Prev Day Volume The change in open interest, expressed as a percentage of yesterday's trading volume in that particular option |
Volume | # Trades | % Single-Leg The percentage of this option's trades from the previous day that were of the single-leg variety | % Multi-Leg The percentage of this option's trades from the previous day that were of the multi-leg variety | % Contingent The percentage of this option's trades from the previous day that were identified as contingent | VWAP | Total Open Interest |
Option OI as % of Total OI The option's open interest, expressed as a percentage of the underlying symbol's total open interest. This will show a concentration of open interest on any one particular option. |
Avg. Underlying Stock Volume |
Option OI Equivalent Shares as % of Avg. Volume Equivalent Shares is the number of shares of stock required to exercise the entire open interest position at once. Usually, this is equal to open interest x 100, as each option contract (typically) covers 100 shares. Then, we take the equivalent shares and express it as a percentage of the underlying symbol's average daily stock volume. |

*** Note: ** Open interest is only calculated once per day, based on settled trades, exercises, and splits. The report shows all of the settled
open interest from the end of the previous trading day.

What is the purpose of this screener? The purpose of the screener is to detect option volume or open interest in a particular option contract that stands out as unusual activity. In order to detect the unusual option volume or open interest, we use relative values and benchmarks.

What are relative values and benchmarks?
Since different stocks have different options volume from day to day, unusual volume for some stocks might be normal volume for other stocks. In order to
detect if a certain stock has unusual activity, we need to compare the activity to what is normal for *that stock*. To do this, we compare
the current levels of activity to a historical benchmark, and calculate how far away the current level is from that benchmark.

Which relative values and benchmarks are used this report, and how can I interpret them?

Volume as % of Avg Underlying Volume: the purpose of this relative value is to detect unusual option
volume in a specific option contract. In order to do this, we create a benchmark -- the average daily option volume for *all* the options for that
underlying symbol. Then for a relative value, we divide the current option volume by that benchmark average. For example, if a particular stock has an
average daily volume of 3,000 contracts and today we see one single option trading 1,500 contracts, we know that this represents 50% of the average
daily volume. This allows us to detect if a particular option has unusual trading, and by how much.

Option Open Interest Change as % of Avg Underlying Volume: the purpose of this calculation is to compare
the open interest change from the prior trading day. As a benchmark, we use the average daily option volume for that underlying symbol. We want to find out
if the open interest changed by a factor of the average daily volume. If the open interest increased by 5,000 contracts for one option, but the average
daily option volume for that symbol is only 1,000 then the increase represents 5 x the average trading volume for one day.

Option Open Interest as % of Total Open Interest: the purpose of this calculation is to spot a
concentration of open interest relative to *all* the open interest for a particular symbol. If GE had 50,000 contracts of open interest in options total,
and the 15-Jan-2021 Call had open interest of 25,000, this would indicate that 50% of the open interest is concentrated in just that one option.