Results and columns

The Options Screener outputs one row per options contract, and each column is a metric for that contract. This page defines every metric the table can show, grouped by category, and explains how to read each one. The Options Screener is available to signed-in Pro accounts. Free and Pro Lite do not include access. There are roughly 50 metrics available; the 14 default columns are a starting subset you can change at any time.

Before you begin

Sign in and open the Options Screener.
To choose which of these columns appear, use the Columns control. See Filters and inputs.

Quickstart

Open the column selector
Select Columns to open Customize Columns.
Add a metric
Search by name or browse by category, then check the columns you want to see.
Sort by a metric
Select the new column's header to rank the matched set by it.

What it shows

The table is a wide, scrollable grid. Each row is one options contract, and each cell is a metric formatted to its natural unit: a dollar price, a percent, a ratio, a count, or a date. Missing values show as N/A. Calls are tinted green and puts red. Several of these metrics also appear grouped into cards in the contract detail view, covered in How to read the results.

The default columns are Symbol, Type, Strike, Expiration, DTE, Last, Bid, Ask, Volume, Open Interest, Delta, IV, IV Rank, and Liquidity. Every other column below can be added.

Outputs and how to read them

The metrics are described by category in the following sections.

Contract basics

Symbol: the underlying stock's ticker.
Contract ID: the unique identifier for that specific contract.
Type: Call (the right to buy) or Put (the right to sell). Calls are tinted green, puts red.
Strike: the price at which the option can be exercised, in dollars.
Expiration: the date the contract expires.
DTE: days to expiration, the number of calendar days left. A lower number means less time value remaining.
Data Date: the date this data was captured.

Pricing

Last: the last traded price of the contract.
Mark: the midpoint between bid and ask, often treated as the fair current price.
Bid: the highest price a buyer is offering.
Ask: the lowest price a seller is asking.
Bid Size and Ask Size: how many contracts are posted at the bid and at the ask.
Spread %: the bid-ask spread as a percent of mark. Smaller is cheaper to trade and usually means better liquidity. See the worked example under How it is calculated.
Stock Price: the current price of the underlying stock.
Moneyness %: how far in or out of the money the contract is, as a percent of strike. Read it together with the option type to know whether the contract is in or out of the money.

Volume and open interest

Volume: contracts traded that day. Higher means more activity today.
Open Interest: total outstanding contracts. Higher means a deeper, more established market.
Vol/OI: volume divided by open interest. A high ratio flags unusually active trading relative to the standing position.

The Greeks

The Greeks are the sensitivities of the option's price to different inputs.

Delta: the change in option price per one-dollar move in the stock. Calls run 0 to 1, puts run minus 1 to 0.
Gamma: how fast delta itself changes as the stock moves. It is highest near at-the-money.
Theta: daily time decay, the value lost per day from time passing. It is usually negative.
Vega: the change in option price per one-point change in implied volatility.
Rho: the change in option price per one-point change in interest rates.

Implied volatility metrics

IV: implied volatility, the market's forecast of how much the stock will move. Higher IV means richer option prices.
IV Rank (1Y): where current IV sits within its own one-year range, where 0 percent is the one-year low and 100 percent is the one-year high. A high rank means volatility is expensive relative to its own past year.
IV %ile (1Y): the share of days over the past year when IV was lower than it is today.

Valuation edge

These columns compare each contract's market price against a model-based fair value. The underlying GNG model is proprietary. This documentation describes what each output measures and how to read it, not the internal formula.

Theo Price: the model's fair value for the contract given current inputs.
Edge $: the dollar gap between theoretical price and market price. A positive value means the market price is below the model's value.
Edge %: that gap as a percent of market price. A positive value suggests the contract looks underpriced versus the model; a negative value suggests it looks rich. Treat this as a screening signal, not a guarantee.

Probability

P(ITM): the model's estimated probability the option finishes in the money.
P(OTM): the probability it finishes out of the money, which is one minus P(ITM). Sellers tend to want a high P(OTM).
Break-Even: the stock price at expiration needed to break even after the premium. See the worked example under How it is calculated.

Liquidity

Liquidity: a composite score from 0 to 100 built from how a contract trades, including volume, open interest, and spread. Higher is more liquid and easier to enter and exit. The scoring weights are proprietary. Read it as a single 0 to 100 tradability gauge where higher is better.

Ticker-level aggregates

These summarize the whole symbol, not a single contract.

P/C Vol Ratio: total put volume divided by total call volume for the symbol. Above 1 leans bearish.
P/C OI Ratio: put open interest divided by call open interest. Above 1 leans bearish in standing positioning.
Total Call Vol and Total Put Vol: total call and put volume across all strikes for the symbol.
Total Call OI and Total Put OI: total call and put open interest across all strikes.
Avg IV: average implied volatility across the symbol's contracts.
Skew (25 delta): the difference between 25-delta put IV and call IV. A positive value, called put skew, is the typical pattern.

Term structure

How implied volatility varies with time to expiration.

IV 30D, IV 60D, IV 90D: average IV for contracts near 30, 60, and 90 days out.
IV Slope: the slope of the IV term structure across those tenors.

Greeks exposure

Ticker-level exposure across the symbol's contracts.

Gamma Exp: net gamma exposure across the symbol's contracts, a gauge of hedging pressure.
Vega Exp: net vega exposure, the symbol's overall sensitivity to volatility changes.

Reference rates

Context columns shown for transparency.

RFR Used: the short-term reference rate used in the model's calculations.
Treasury 3M and Treasury 5Y: the 3-month and 5-year U.S. Treasury yields, from AlphaVantage, shown as reference context.

How it is calculated

Most columns are read directly from the snapshot or are standard derived figures. Two derived columns illustrate the transparent math behind them. The proprietary valuation, probability, and liquidity columns are described by what they measure, not by formula.

Spread percent

Spread percent expresses the gap between bid and ask as a share of the mark price, so you can compare execution cost across contracts at different prices.

spread percent = (ask − bid) / mark × 100

Here ask and bid are the posted ask and bid in dollars, and mark is their midpoint. For example, a bid of 1.95 and an ask of 2.05 give a mark of 2.00, so the spread percent is (2.05 minus 1.95) divided by 2.00, times 100, which is 5%. A lower spread percent usually means a tighter, more liquid market that is cheaper to trade.

Break-even

Break-even is the underlying price at expiration where the trade neither gains nor loses, after paying the premium.

break-even = strike + premium

For a long call, strike is the strike price in dollars and premium is the price paid per share. For example, a 100 strike call bought for 3.00 breaks even at 103.00. For a long put the premium is subtracted from the strike, so a 100 strike put bought for 3.00 breaks even at 97.00. Break-even ignores commissions and assignment effects.

The proprietary columns

The theoretical price, the edge in dollars and percent, the in-the-money and out-of-the-money probabilities, and the liquidity score come from GNG Research's own model. This documentation states what each output measures, the categories of inputs that feed it, its scale, and how to read it, but not the internal formula, weights, or thresholds. Read them as screening signals and relative rankings, not as guarantees.

Data and timing

Every column reflects the most recent daily snapshot, sourced from AlphaVantage: prices, volume, open interest, implied volatility, and the standard Greeks per contract, plus underlying stock prices and U.S. Treasury reference rates. Quotes for the underlying come via AlphaVantage. The derived columns (days to expiration, moneyness, spread percent, the volume-to-open-interest ratio, IV rank and percentile over the past year, the model-based columns, and the ticker aggregates) are computed from those inputs. Values reflect the daily snapshot rather than live intraday quotes, and some contracts have missing fields shown as N/A.

Use cases

Build an income view that emphasizes theta, P(OTM), IV rank, and liquidity.
Build a volatility view that emphasizes IV rank, vega, skew, and the term-structure columns.
Sort by liquidity, spread percent, volume, and open interest to find contracts that are realistic to trade.
Add the edge columns to flag contracts that look cheap or rich versus the model, as a starting point for research.

Limitations and disclosures

The data reflects the latest daily snapshot, not live intraday quotes, so values can be stale and some fields show as N/A. The model-based columns (theoretical price, edge, probabilities) and the liquidity score are screening signals from a model, not predictions of outcomes; real fills, slippage, and assignment risk are not modeled. Because these columns read as guidance, the page carries the disclosure below.

GNG Research provides equity research and educational tools, not investment advice. Nothing on the platform is a recommendation to buy or sell any security. Do your own research and consider your circumstances before making any investment decision.