What is implied volatility and how does it affect premium?

Implied volatility is the market's forecast of how much a stock will move, expressed as an annualized percentage — and it's the single biggest driver of how much premium you collect when selling options. Higher IV means fatter premiums. Lower IV means you're leaving money on the table if you sell.

Here's the clearest way to think about it: IV isn't historical. It's not looking backward at what the stock did. It's what options buyers are paying to be protected against future moves. When fear spikes, buyers pay more for that protection, and as a seller, that's your payday.

The Mechanics Behind the Number

Options pricing models (Black-Scholes being the most common) take a bunch of inputs — stock price, strike price, time to expiration, interest rates — and spit out a theoretical price. IV is the one variable that gets implied backward from the actual market price. If the model says an option should cost $2.00 but it's trading at $3.50, the market is pricing in more uncertainty than the model's baseline assumes. That gap is elevated IV.

When you're running the wheel on something like NVDA, you'll notice the premiums look wildly different depending on when you're selling. Before an earnings announcement, IV on NVDA can run 80-90%. In a quiet stretch between catalysts, it might sit at 45-50%. Same stock, same delta, completely different premium. A 30-delta put at 45 DTE might collect $3.20 in low IV and $6.80 in high IV. That's not a small difference — that's the difference between a 2% return on your cash and a 4% return.

IV Rank and IV Percentile — Don't Skip This

Raw IV numbers are almost useless without context. Saying "NVDA has 60% IV" tells you nothing unless you know what's normal for NVDA. This is where IV Rank (IVR) comes in.

IV Rank compares current IV to the stock's IV range over the past 52 weeks. If NVDA's IV has ranged from 40% to 100% over the past year, and it's currently sitting at 70%, that's an IVR of roughly 50 — right in the middle. Not ideal, not terrible.

For wheel trading, you generally want to sell when IVR is above 50, ideally above 70. You're collecting premium when fear is elevated, and you're getting paid for uncertainty that may never materialize. Tastyworks (now Tastytrade) publishes IVR directly on their platform, and thinkorswim shows it in the options chain header. Check it before you enter any position.

What Happens After You Sell

This is where a lot of intermediate traders get tripped up. You sell a cash-secured put on AAPL at a 30-delta strike, collect $2.40, and feel good. Then IV drops from 35% to 22% over the next two weeks — even if AAPL barely moves. Your option might now be worth $1.10. That's not bad news. That's IV crush working in your favor.

The flip side is IV expansion. You sell a put, the stock stays flat, but some macro event spooks the market. IV jumps from 30% to 55%. Your $2.40 option is now worth $4.20 even though AAPL didn't go anywhere. On paper, you're losing. This is where discipline matters — you haven't been wrong about direction, you've just been caught in a volatility spike. Most of the time, if you hold through it, IV reverts and your position recovers.

The practical rule I use: if IV has expanded but the stock hasn't moved against me significantly, I hold. If the stock is moving toward my strike and IV is expanding, that's a double threat worth managing.

Earnings Are the Big IV Event

For wheel traders, earnings are the most predictable IV event you'll encounter. IV almost always inflates heading into earnings, then collapses immediately after — regardless of whether the move was big or small. This is called "IV crush" and it's why selling options right before earnings can be tempting but dangerous.

If you sell a put on AAPL two days before earnings, you're collecting elevated premium — but you're also taking on the risk of a big directional move. If AAPL gaps down 8% after a bad report, your elevated premium does very little to protect you. Most experienced wheel traders skip earnings entirely or close positions before the announcement. The premium looks great until it doesn't.

A Practical Approach You Can Use Today

Before you enter your next wheel position, do this: pull up the stock on whatever platform you use and check the IV Rank. If it's below 30, seriously consider waiting or finding a different underlying with better premium. If it's above 50, you're in reasonable territory. Above 70, you're getting paid well for the risk.

Then look at the premium you're collecting as a percentage of the strike price. For a 30-delta put, you want to see at least 1-2% of the strike per month in premium. If AAPL is at $195 and a 30-delta put at $185 is only collecting $0.80 for 30 DTE, that's less than 0.5% — IV is probably too low to bother.

Selling premium is a volatility business. Understanding IV is what separates traders who are just mechanically running the wheel from traders who are actually timing their entries well and maximizing what they collect.