If you’re new to options trading on platforms like Interactive Brokers, you might come across terms and figures in an options chain that seem confusing at first. One such term is “options volume,” often abbreviated as “Opt Vlm.” In the screenshot of National Grid PLC (NG.) options on Interactive Brokers, you’ll notice that “Opt Vlm” isn’t specified—it shows as “—.” This article will explain what options volume is, why it might not appear, and how to interpret related data like bid/ask sizes and open interest to understand market interest and liquidity.
What Is Options Volume?
Options volume refers to the total number of options contracts traded for a specific stock or security during a trading day. It’s a key indicator of how active trading is for those options and can reflect overall market interest. High volume often suggests significant trader interest, while low or missing volume might indicate quieter trading activity. However, the absence of volume data in the screenshot here doesn’t necessarily mean there’s no interest in National Grid PLC options—it could stem from other factors.
Why Isn’t Options Volume Specified in the Screenshot?
There are several reasons why “Opt Vlm” might not be displayed for National Grid PLC options in this example screenshot:
- Low or No Trading Activity on the Day: If no options contracts for NG. were traded on the day this data was captured, the volume might not be shown or could appear as a dash (“—”). This doesn’t mean there’s no interest overall, but rather that it was a quiet trading day for those options.
- Data Not Yet Updated: Trading platforms like Interactive Brokers may take time to update volume data, especially for less frequently traded securities. If the snapshot was taken early in the trading day or during low activity, the volume might not have been recorded or displayed yet.
- Low Options Liquidity: National Grid, a utility company, tends to have lower implied volatility (shown in the screenshot as 18.8% IV Last), which often correlates with lower options trading volume. Utility stocks are generally stable, attracting less interest from options traders compared to more volatile stocks. If the options are thinly traded, the volume might be so low that it’s not displayed for that session.
- Platform or Display Limitation: Interactive Brokers might have thresholds or conditions under which option volume is shown. If the volume is below a certain level or if there’s no data available, the field might be left blank or marked with a dash. This could be a design choice or a technical limitation for certain stocks or options.
Despite the missing volume, other metrics in the screenshot—like implied volatility, historical volatility, open interest, and bid/ask sizes—can still provide insight into market interest and activity.
What Do the Bid/Ask Sizes and Open Interest Tell Us?
Even if daily options volume isn’t shown, the yellow-highlighted prices on the right side of the options chain (under the “Ask” column for calls and the “Bid” column for puts) and the small numbers beneath them offer valuable clues. These numbers indicate the number of contracts available at those specific bid and ask prices, often called the “size” or “quantity” of contracts at that level.
For example:
- Under the $26.50 ask price for the $24.00 call, you see “37,” meaning there are 37 contracts available to buy at $26.50.
- Under the $15.25 bid price for the $24.00 put, you see “10,” indicating 10 contracts available to sell at $15.25.
These sizes show current market interest and liquidity at those price levels. A larger number (e.g., 37 contracts) suggests better liquidity, making it more likely you can execute a trade quickly at that price. Smaller numbers (e.g., 1 contract at $9.75 for the $6.00 call) indicate thinner liquidity, which could make it harder to fill larger orders or execute trades swiftly.
Additionally, the “Last” column (e.g., 965 for the $26.00 call) shows open interest—the total number of outstanding contracts. This reflects longer-term interest in the options, even if daily trading volume is low.
However, these sizes don’t guarantee execution. They represent available contracts in the order book, but trades only occur if someone places a matching order on the opposite side (e.g., a buy order at the ask or a sell order at the bid). The speed and certainty of execution depend on factors like overall liquidity, market conditions, and your order type (market vs. limit). For less liquid stocks like National Grid, execution might be slower or less certain, especially for larger orders or during quiet market periods.
Does This Show Interest in the Options (in this example)?
Yes, the presence of bid/ask sizes and open interest does indicate some level of interest in National Grid PLC options, even if daily volume isn’t displayed. It suggests that traders or market makers are willing to buy or sell at those prices, and the open interest shows contracts are being held by investors. However, the level of activity might be lower compared to more volatile or heavily traded stocks, which is typical for utility companies with stable stock prices and lower implied volatility.
Tips for New Traders
If you’re using Interactive Brokers or another platform to trade options, keep these points in mind:
- Don’t assume missing volume means no interest—check bid/ask sizes, open interest, and historical data for a fuller picture.
- Larger bid/ask sizes generally mean better liquidity and faster execution, while smaller sizes suggest thinner markets where prices might move more with your order.
- For stocks like National Grid with potentially lower options liquidity, plan your trades carefully, considering order size, type, and market conditions.
By understanding options volume and related metrics, you can make more informed decisions as you navigate the world of options trading on platforms like Interactive Brokers.
