Options trading is fundamentally different from buying stocks. When you buy a stock, you own a piece of the company — and while its value can drop, it rarely goes to zero overnight. Options, on the other hand, are contracts with expiration dates. They can lose all of their value in a matter of days or hours.
That difference in structure means the mistakes you make with options tend to be more costly, and less forgiving, than the ones you make with stocks.
The good news is that most of these losses come from a handful of avoidable mistakes. Here are the ones worth knowing about — and how to steer clear of them.
Forgetting you can lose it all
Options trading mistakes often start with a misunderstanding of risk. Unlike stocks, which rarely drop all the way to zero, options can — and frequently do — expire worthless. If the underlying stock doesn't move past your strike price before the contract expires, you lose 100% of what you paid.
Let's say you want to buy a call option on a stock called $KALE. (If you're not familiar with the terminology, a glossary of options terms can help.) One share costs $200 today, but you think it's going to go up.
So you buy an option that gives you the right to buy 100 shares of $KALE for $220 each (called the strike price) two months from now, no matter the market price. If $KALE never gets higher than your strike price, and you cannot find someone to take the option off your hands before it expires, you could be left with nothing. The lesson: never invest money you're not willing to lose.
Paying attention to direction, but not magnitude
Buying options is like betting a friend that you'll beat him by three in a pickup basketball game. You can win by two and still lose the bet. Back to $KALE: say you had a good feeling that the company was going to announce big news the next day. You could buy a one-day option that paid off if shares went up 30%.
If, after the big announcement, $KALE shares rose 23%, regular investors would be thrilled — but not you. The underlying stock rose drastically, but it didn't rise enough. Your option would've lost most, and probably all, of its value.
Thinking you can always find a buyer
If you can dream up an option, someone will sell it to you — even if it's unrealistic. For example, say you think $KALE's stock price will go from $200 to $400 in two days. Someone will sell you that option.
But before you buy it, you need to realise how hard it might be to sell again. Options with unusual strike prices or short time frames tend to have very few buyers. That lack of demand means you'll get a low price for it — if you can find a buyer at all. This is called liquidity risk, and it's one of the most overlooked mistakes in options trading.
Ignoring implied volatility
Implied volatility (IV) is a measure of how much the market expects a stock's price to move over a given period. It directly affects how much you pay for an option:
High IV — option premiums are expensive because the market expects big price swings
Low IV — premiums are cheaper because the market expects relative calm
If you buy options when IV is elevated — say, right before an earnings announcement — you could pay a steep premium. And if IV drops afterward (sometimes called a "volatility crush"), your option's value can fall even if the stock moves in your direction.
Before buying, check whether IV is high relative to its historical range. If it is, the option may be priced for a bigger move than what actually happens.
Not sizing your positions properly
When an options trade goes well, it's tempting to go bigger next time. But options can move fast — and putting too much capital into a single trade means one bad outcome can seriously damage your portfolio. A common rule of thumb is to risk a small percentage of your total capital on any single trade:
Conservative approach — risk 1% to 2% per trade
Moderate approach — risk 3% to 5% per trade
On the other hand, trading too small can make the whole exercise feel pointless. The goal is to find a position size that's meaningful enough to matter but small enough that you can absorb a total loss without panic.
Not realising shorter-duration options increase risk
Like milk, at some point all options expire. It could be 6 months from now, 2 weeks, or a few hours. The closer you get to expiry, the higher the odds the option loses all of its value. This is called time decay — and it accelerates as the expiration date approaches.
This is why zero-day options (options that expire the same day they're traded) are so risky. In the first $KALE example, you have a two-month option to buy $KALE for $220/share. If the stock price falls from $200 to $180 the day after you buy the option, the value will fall, but probably not by too much — there's still plenty of time for recovery.
If you've got a single day before expiry, however, that same fall in stock price will tank the option's value. There's not enough time to reasonably expect a recovery.
Buying short-term options with long-term expectations
Cheaper options tend to have shorter windows. Something has to happen quickly for them to hit their strike price — which makes them risky. That's why investors buy them when they have specific expectations of something happening within that window.
Back to $KALE: if you buy that one-day call option that pays out if the stock price goes up 30% or more, you really should have a reason. A specific one. Having a good feeling about the CEO's general abilities as a leader is not a specific reason. Seeing clues that they're about to announce a big money-saving reduction in the company's workforce is. The more general your feeling, the safer you are with longer-term options, which give those feelings more time to come true.
Letting an option expire without funds to exercise
Most retail investors sell their options before expiry. They get in and get out, and make or lose money depending on the value of the option when they sell it. But you can hold the option until it expires and buy the stock at your preset price.
In the $KALE example, buying 100 shares at $220 (called exercising the option) would mean coming up with $22,000. You could sell the shares immediately and collect a profit of $20/share — but you'd need enough money to buy them first.
If you're holding an option when it expires and you don't have the funds to exercise it, you're out of luck. You make no money, and to make things worse, you've lost whatever you paid for the option. It would be a real gut punch to make the right call and still end up with nothing.
How to avoid losing money on options
There's no guaranteed way to profit from options, but you can reduce the odds of costly mistakes:
Educate yourself — understand how options are priced, what affects their value, and how time works against buyers
Trade with money you can afford to lose — and keep your position sizes in check
Have a plan before entering any trade — know your target, your maximum loss, and your exit point
Consider longer-dated options — they give your thesis more time to play out
The fewer surprises you leave yourself open to, the better.
