Options with Nova

Nova

Hi! I'm Nova. I love two things: puzzles and patterns. The stock market has plenty of both. Options are one of the most interesting puzzles in it: they mix price, time, and probability into one little contract. By the end of this guide you'll know how to read an option, calculate exactly what you could win or lose, and spot the traps that catch a lot of grown-ups. My motto: "Run the numbers before you click."

How this guide works

• Nine short lessons, about a page each. Each one has a Worked SPY Example with real-looking numbers and a Mini Quiz. The answers are in the key at the back, so try first!
• Our running example is SPY, the fund that tracks the S&P 500. We'll mostly pretend SPY is trading at $580.
• Big focus: short-dated options: 0DTE (expires today), daily, and weekly expirations. They're fast and exciting, and that's exactly why they need respect.
• At the end: a paper-trading challenge, a one-page cheat sheet, a glossary of every term, and the answer key.

Table of contents

1. 1 Stocks, ETFs & what SPY is
2. 2 What's an option? Calls vs. puts
3. 3 Strike, premium, expiration & "the money"
4. 4 Payoff at expiration (do the math!)
5. 5 The Greeks, kid-level (but real)
6. 6 Why short-dated options swing so much
7. 7 Spreads: risk with a ceiling and a floor
8. 8 Honest risk lessons
9. 9 Your paper-trading challenge
10. + Cheat sheet · Glossary · Answer key

A stock (also called a share) is a tiny slice of ownership in a company. Own one share of a company and you own a teeny piece of it. The share price moves all day as buyers and sellers trade it: more eager buyers push the price up, more eager sellers push it down.

An ETF (exchange-traded fund) is a basket of many stocks packaged into one thing you can buy or sell just like a single stock. Instead of picking one company, you get a little of many at once. That's called diversification: if one company has a bad day, it's only a small part of the basket.

The S&P 500 is an index: a scoreboard that tracks about 500 of the largest U.S. companies (think big tech, banks, stores, energy and healthcare companies). You can't buy an index directly. It's just a number. So people built funds that copy it.

SPY (the SPDR S&P 500 ETF Trust) is the most famous of those funds. It launched in 1993 as the first U.S.-listed ETF, and it holds the stocks in the S&P 500 so that its price follows the index. A handy rule of thumb: SPY's price is roughly 1/10 of the S&P 500 level (not exact, because of fund fees and dividends). SPY is one of the most heavily traded securities on Earth, and options on SPY are some of the most actively traded options anywhere. That's why it makes a great example.

Nova's tip

"The market" on the news usually means the S&P 500. When someone says "stocks were up 1% today," SPY probably was too. Knowing SPY ≈ market makes everything in this guide easier to picture.

An option is a contract that gives the buyer the right, but not the obligation, to buy or sell something at a locked-in price (the strike) until a certain date (the expiration). The buyer pays for that right. The price paid is called the premium, and it goes to the seller (also called the writer), who takes on the obligation.

CALL = the right to BUY at the strike. Calls get more valuable when the price goes up.

PUT = the right to SELL at the strike. Puts get more valuable when the price goes down.

The expiration menu: how long does your "coupon" last?

• Strike: the locked-in price. A "582 call" can buy SPY at $582.
• Expiration: the last day the option exists. After that, it's either worth something or it's gone.
• Premium: the option's price, quoted per share. Here's the big one: 1 contract = 100 shares. So a premium of $1.20 really costs $1.20 × 100 = $120. (Brokers may add small per-contract fees; we'll ignore them to keep the math clean.)
• Bid / Ask: the bid is what buyers will pay right now, the ask is what sellers want. The real price is usually somewhere between. We use the middle ("mid") here.

In, at, or out of the money?

Every premium has two parts: Intrinsic value is what it would be worth if it expired right now (how far ITM it is). Extrinsic value (also called time value) is everything else: the extra people pay for the chance it moves further before expiration.

578 call @ $3.25 with SPY at $580 → intrinsic = 580 − 578 = $2.00 · time value = $3.25 − $2.00 = $1.25

OTM options are 100% time value. If SPY never reaches the strike, that time value melts to zero by expiration.

Nova's tip

Always multiply by 100 in your head. A "$0.45" option sounds like pocket change, but it's really $45. Ten of them = $450. Tiny-looking numbers are how people accidentally take big risks.

At expiration, an option is worth exactly its intrinsic value. Nothing more, because there's no time left. That makes the end-of-day math clean:

Call value at expiration = max(SPY − strike, 0)   Put value = max(strike − SPY, 0)

Call break-even = strike + premium   Put break-even = strike − premium   Buyer's max loss = premium paid

🧮 Worked SPY Example: 0DTE call (illustrative prices)

Around 12:30 PM, SPY is at $580. You buy 1 SPY 582 call expiring today for $0.90 → cost = 0.90 × 100 = $90.
Break-even = 582 + 0.90 = $582.90. SPY must rise more than $2.90 (about 0.5%) by the close just for you to not lose.

SPY close	Value/sh	Contract	Profit / loss
$578.00	$0.00	$0	−$90 (−100%)
$580.00	$0.00	$0	−$90 (−100%)
$582.00	$0.00	$0	−$90 (−100%)
$582.90	$0.90	$90	$0 (break-even)
$584.00	$2.00	$200	+$110 (+122%)
$586.00	$4.00	$400	+$310 (+344%)

If SPY just sits still (or only ticks up $2), you lose everything. That's what "the option expired worthless" means.

Δ Delta: "How much do I move?"

Delta is about how much the option's price changes when SPY moves $1. A call with delta 0.33 gains about $0.33 (= $33 per contract) if SPY rises $1. Puts have negative delta (they gain when SPY falls). Bonus rule of thumb: delta is roughly the chance the option finishes in the money. A 0.33-delta call has very roughly a 1-in-3 shot.

Θ Theta: the melting ice cube

Time value melts every day, even if SPY doesn't move at all. That's time decay, measured by theta. And the melting speeds up as expiration gets closer. A month out, the ice cube is big and melts slowly. In the final days it shrinks fast. On a 0DTE day, it melts by the hour.

A spread means buying one option and selling another on the same stock and expiration but at different strikes. Selling the second option lowers your cost, but it also caps your profit. The win: your max loss and max gain are known before you start.

Debit spread: max loss = net debit   max gain = strike width − debit

🐂 Bull call spread (weekly, expires Friday)

SPY $580. Buy 580 call @ $2.00, sell 585 call @ $0.50.
Net debit = 2.00 − 0.50 = $1.50 → $150
Max loss = $150 (SPY ≤ $580 at expiration)
Max gain = (5 − 1.50) × 100 = $350 (SPY ≥ $585)
Break-even = 580 + 1.50 = $581.50

🐻 Bear put spread (weekly, expires Friday)

SPY $580. Buy 580 put @ $1.90, sell 575 put @ $0.60.
Net debit = 1.90 − 0.60 = $1.30 → $130
Max loss = $130 (SPY ≥ $580 at expiration)
Max gain = (5 − 1.30) × 100 = $370 (SPY ≤ $575)
Break-even = 580 − 1.30 = $578.70

⚠ Credit spreads: defined risk is still REAL risk

A credit spread flips it around: you sell the more expensive option and get paid up front. Example bull put credit spread: sell 575 put @ $1.00, buy 570 put @ $0.40 → collect $0.60 ($60). Max gain = $60 (SPY ≥ $575). Max loss = (5 − 0.60) × 100 = $440 (SPY ≤ $570). Break-even = $574.40. You win small most of the time, then occasionally lose 7× as much. Also, SPY options are American-style, so a short option can be assigned early. Most traders close spreads before expiration to avoid surprises.

1. Most short-dated options that people buy expire worthless. Cheap OTM options are cheap because they usually lose. A 0.20-delta call finishes ITM only about 1 time in 5, and even then it might not get past break-even.
2. Buyers can lose 100%, fast. With 0DTE, "fast" means hours or minutes (Lesson 6).
3. Sellers of naked options can lose MORE than they put in. Selling an option without owning protection is called naked selling. For calls, the loss has no ceiling.

4. Emotions are the real opponent. Watch for FOMO (fear of missing out), revenge trading (trying to "win it back" right after a loss), and overtrading (clicking because it's exciting, not because there's a plan). 0DTE feels like a video game. That's the danger.
5. Position sizing keeps you in the game. A common rule: never risk more than 1–2% of your account on one trade.

Nova's challenge

Here's the twist: you score points for following your rules, not for making money. Pros last because of process, not luck. Start with a $10,000 paper account and review your journal each weekend with your family.

Tip: write your plan before you click. If you can't fill in the "max loss" and "exit plan" boxes, you're not ready for that trade.

Trade journal (copy this into a notebook or spreadsheet)

Scorecard: points for process

0DTE

"Zero days to expiration": an option that expires today.

American-style

An option that can be exercised any time up to expiration. SPY options are American-style.

Ask

The lowest price a seller is currently willing to accept.

Assignment

When an option seller is required to fulfill the contract (sell or buy the shares) because the buyer exercised.

At the money (ATM)

Strike is about equal to the current stock price.

Auto-exercise

Options ITM by $0.01 or more at expiration are normally exercised automatically.

Bear / bearish

Expecting prices to fall.

Bear put spread

Buy a put and sell a lower-strike put (same expiration). Profits if the price falls; risk capped at the debit.

Bid

The highest price a buyer is currently willing to pay.

Break-even (BE)

The price at expiration where a trade neither makes nor loses money.

Bull / bullish

Expecting prices to rise.

Bull call spread

Buy a call and sell a higher-strike call (same expiration). Profits if the price rises; risk capped at the debit.

Bull put credit spread

Sell a put and buy a lower-strike put. Collect a credit up front; max loss = width − credit.

Call

An option giving the right to buy at the strike price.

Cash-settled

Settled in cash instead of shares (e.g., SPX index options).

Contract

One option; for SPY it covers 100 shares.

Credit spread

A spread where you receive money up front; defined but real risk.

Custodial account

An account (UTMA/UGMA) an adult manages for a minor; generally can't trade options.

Debit spread

A spread where you pay money up front; max loss = the debit.

Delta (Δ)

How much an option's price changes per $1 move in the stock; roughly the chance of finishing ITM.

Diversification

Spreading money across many investments so one bad one hurts less.

DTE

Days to expiration.

ETF

Exchange-traded fund: a basket of investments that trades like one stock.

European-style

An option that can be exercised only at expiration (e.g., SPX options).

Exercise

Using the option's right to buy (call) or sell (put) at the strike.

Expiration

The last day an option exists.

Extrinsic / time value

The part of the premium above intrinsic value; melts to zero by expiration.

FOMO

Fear of missing out: trading because others seem to be winning.

Gamma (Γ)

How fast delta changes as the stock moves; largest for ATM options near expiration.

Implied volatility (IV)

The market's expectation of how much the stock will move; higher IV = pricier options.

In the money (ITM)

Call: stock above strike. Put: stock below strike.

Index

A number that tracks a group of stocks, like the S&P 500.

Intrinsic value

What an option would be worth if exercised right now (how far ITM).

IV crush

A sharp drop in implied volatility, often right after big news, which lowers option prices.

Leverage

Controlling a big position with a small amount of money, which magnifies % gains and losses.

Max gain / max loss

The most a trade can make or lose.

Monthly options

Standard options expiring the 3rd Friday of the month.

Naked option

Selling an option without owning the shares or a protective option; risk can exceed what you collect.

Option

A contract giving the right (not obligation) to buy or sell at a set price until expiration.

Option chain

The table listing all strikes and prices for an expiration.

Out of the money (OTM)

Call: stock below strike. Put: stock above strike. All time value.

Overtrading

Trading too often, usually out of excitement rather than a plan.

Paper trading

Practicing trades with pretend money in a simulator.

Physically settled

Exercise results in actual shares changing hands (SPY options).

Position sizing

Deciding how much to risk on one trade (e.g., ≤1–2% of the account).

Premium

The price of an option, quoted per share (× 100 per contract).

Put

An option giving the right to sell at the strike price.

Revenge trading

Rushing into a trade to "win back" a loss.

S&P 500

An index of about 500 large U.S. companies.

Sell to close

Selling an option you own to exit before expiration.

Seller / writer

The person who sells an option, collects the premium, and takes on the obligation.

Share / stock

A unit of ownership in a company.

Spread

Buying one option and selling another to shape (and cap) risk and reward.

SPX

Options on the S&P 500 index itself; European-style and cash-settled.

SPY

The SPDR S&P 500 ETF Trust, which tracks the S&P 500; price ≈ 1/10 of the index.

Strike

The locked-in price in an option contract.

Theta (Θ)

How much value an option loses per day from time passing.

Time decay

The melting of time value as expiration approaches.

Time stop

A rule to exit a trade by a certain time, no matter what.

Underlying

The stock or ETF an option is based on (here, SPY).

Vega (ν)

How much an option's price changes when implied volatility changes.

Volatility

How much and how fast a price moves around.

Weekly options

Options that expire at the end of a given week (usually Friday).