Volume
Volume is the number of option contracts traded in a single day. Learn how it differs from open interest and why it signals how easily you can trade an option.
Volume is the number of option contracts traded in a single day. Every time a contract changes hands, it adds to that day's volume. At the closing bell, the count resets, and tomorrow starts fresh at zero.
It is one of the simplest numbers on an options screen, and one of the most useful for judging whether an option is worth trading. Let me show you.
Today's Foot Traffic
Think of a store. Volume is how many customers walked in today. A busy shop with steady foot traffic feels alive: easy to find what you want, quick to check out. An empty store is a different experience entirely.
Options work the same way. High volume means the option is actively trading hands today, so buyers and sellers are everywhere. Low volume means the option is quiet, and you may struggle to trade it at a fair price.
And unlike open interest, which is a standing count of all live contracts, volume is strictly today's number. It measures the day's activity and nothing more.
Why It Matters
Volume tells you how easily you can trade an option right now.
High volume means lots of activity today, which usually means tight bid-ask spreads and fast, fair fills. You can get in and out without much friction, because someone is always ready to take the other side.
Low volume means the option is barely trading today. You might wait to get filled, accept a worse price, or find it hard to sell when you want out. Thin options can trap you in a position that is awkward to exit.
The best signal comes from reading volume and open interest together. High open interest tells you the option has a solid base of live positions, and high volume tells you it is active today too. When both are healthy, you have a liquid option that is easy and cheap to trade.
- Volume is the number of contracts traded in a single day.
- It resets to zero each morning, unlike open interest.
- High volume means tight spreads and easy fills; low volume means the opposite.
- Read volume and open interest together to judge liquidity.
Pop Quiz
Three quick questions to see what stuck. Pick an answer and the explanation shows up right away.
What does volume measure?
Volume is today's trading count, like the foot traffic through a store in one day. It resets each morning.
What happens to volume at the end of each day?
Volume is a daily count. Each new day it starts fresh at zero, unlike the running total of open interest.
What does high volume usually mean for your trade?
Lots of activity means many buyers and sellers, which brings tight spreads and quick, fair fills.
Bottom Line
Volume is the day's foot traffic through an option: how many contracts traded today, reset each morning. High volume signals an active, liquid option with tight spreads and easy exits. Low volume warns you the option is thin and may be hard to trade fairly.
Pair it with open interest, and you get a clear read on whether an option is a comfortable place to put your money or a quiet corner you might get stuck in.
Keep going: its standing-count cousin is open interest, and together they shape the bid-ask spread.