Implied Volatility (IV) in Options Trading: From Newbie to Mastery

What is implied Volatility? In simple terms, it is like this.

In options trading, the term “Volatility” is often mentioned, especially Implied Volatility (IV). Simply put, IV is the market's expectation of the future price fluctuation magnitude. Your judgment on price fluctuations directly determines whether you make a profit or a loss in your options trading.

There are two easily confused concepts here:

• Historical Volatility (HV): Looks at how fierce the past fluctuations have been.
• Implied Volatility (IV): It guesses how fierce the future fluctuations will be.

Both indicators are expressed as annualized percentages. The core difference is that HV looks to the past, while IV looks to the future. The higher the market's expectation for IV, the more expensive the option prices.

How does IV affect option prices?

Option price = intrinsic value + time value. Only the time value part is affected by IV.

Using Vega to measure: how much the option price changes when IV changes by 1%. Generally speaking, the higher the IV, the more expensive the option. This is because high volatility means a greater probability of extreme price movements, which is good for the buyer.

Understand with examples:

Andy bought a call option for BTC, with the current BTC price at 20000 USDT and a strike price of 25000 USDT.

• If the BTC price has a large fluctuation, the probability of breaking 25000 at expiration is high, and Andy makes a profit.
• If BTC fluctuation is not significant, it may still be below 25000 at expiration, and Andy will lose the premium.

→ Buyers hope for high Fluctuation (beneficial during high IV)
→ The seller hopes for low fluctuation (beneficial when IV is low)

IV also depends on the remaining time and the execution price

Impact of Time: The longer the remaining time, the greater the impact of IV on price. Because with more time, the price has more opportunities to experience extreme fluctuations.

Impact of Strike Price: Typically, the lowest point of IV is at ATM (At-The-Money options); the further away from the strike price, the higher the IV. This forms a “Volatility Smile.”

Why? Because options that are far from the strike price, if the price suddenly fluctuates violently, the seller cannot effectively hedge the risk, so they need to raise the IV to compensate for the risk.

How to determine if IV is expensive or cheap?

Comparing IV and HV:

• IV > HV: Options are overvalued, consider implementing a short volatility strategy (e.g., short straddle)
• IV < HV: The options are undervalued, consider implementing a long volatility strategy (such as a long straddle)

In practice, compare the long-term data (60 days) and short-term data (20 days) of HV to comprehensively assess whether the IV is reasonable.

How to trade IV on Gate?

On the options trading page, select “IV mode” and place orders directly based on the IV quotes. Note that your order price will change in real-time with the underlying asset price and remaining time.

Key Takeaways Summary

✓ High IV = expensive options, only volatility strategies have profit potential ✓ Low IV = Options are cheap, reverse volatility strategies are worth considering ✓ Don't just look at absolute numbers, compare them with historical levels. ✓ Managing Delta simultaneously while keeping the position neutral is the safest.