Last week I made the case that almost everyone in the market is a trader, they just won’t say it out loud. I left one thread dangling. The reason so many people flinch at the word “trader” in the first place is that, in their heads, it sits a little too close to another word. Gambling.

So let’s settle that one, because it matters more than it looks. Anyone hoping to pull a steady income out of the markets cannot afford to be chasing thrills and praying for good luck. Those two things will quietly bankrupt you. And by the end of this I’ll have handed you the one number that tells you, mathematically, whether you’re trading or gambling. It’s called expectancy, and once you understand it you can never quite see the markets the same way again.

What Gambling Actually Looks Like

A few years back I was sitting in a café in Singapore with a mate who has nothing to do with the investment world. He asked me what I’d been trading lately, which is the question people often ask me. So I gave him the rundown... what I’d made money on, what I’d dropped a bit on.

Then I asked him the same. He told me he’d sworn off trading stocks entirely since 2008, when he lost a bundle. No more “gambling” for him, he said. From here on he was sticking to buying ETFs.

I’ve never quite gelled with that point of view. And here’s the part that always makes me smile.

When my mate buys an ETF or an index fund, he is not a long-term investor in a business whose cashflows he has modelled and whose valuation he understands. He’s buying a financial asset that he expects to sell at a higher price somewhere down the track. Which, as I laid out last week, is the very definition of trading.

So watch what happens. Just about every smart financial commentator on earth is right now urging every investor who’ll listen to pile into ETFs and index funds. Meanwhile, not a single one of them is suggesting you put 40% of your net worth on the blackjack table. Why the difference? Because blackjack is gambling. And ETFs, apparently, are not.

So my mate says trading stocks is gambling, and billionaire hedge fund managers say trading stocks is not gambling. They can’t both be right. To work out who is, we need to talk about three things... motivation, intent, and odds.

Motivation, Intent, and Odds

What is a gambler actually after? What’s the motivation?

A gambler wants an outsized, lottery-style payoff. Something they haven’t worked for. Something they know, deep down, they don’t really deserve and they’ll be lucky to get.

If I put $100 on red at the roulette table, I know I don’t deserve to win. My odds on any single spin are 47.37%. Sure, I might win this once. But play the long game and the maths is merciless... I am more likely than not to lose money.

And right there is the thrill of it. If I put $100 on red and it lands, I’ve done something a bit naughty, something I know I shouldn’t, and I’ve gotten away with it. I’ve beaten odds that were stacked against me and walked away grinning. It’s a bit like surviving a wipeout on a monster wave. It’s a rush. Some people are addicted to that rush.

“Money won is twice as sweet as money earned.” - Fast Eddie Felson, The Color of Money

There’s nothing remotely thrilling about buying an index fund, or any other “safe” parking spot for your money. Over a long enough horizon you know you’ll win, and there’s nothing naughty or exciting about that. A term deposit or a government bond is a yawn-fest. Zero chance you’ll double your money, near-zero chance you’ll lose any, if held to maturity. You’ll make your 4% and that’s the end of the story.

Trading is neither of those things. There are no guarantees waiting for you, and no government underwriting the downside. So does the absence of a safety net make trading gambling?

It depends. And what it depends on is the whole ballgame.

When Buying Shares Really Is Gambling

If I buy a random penny stock, that’s gambling, and I can tell you exactly why.

It comes back to odds and intent. The only reason I’m touching that penny stock is a hope that it hands me a lottery-style return. But the odds of it actually 10x-ing are unknowable. Maybe it will. Probably it won’t. But my intent is mostly to get lucky. When the odds are unknowable and I’m hoping and wishing on a star... that is gambling, plain and simple.

What about a blue-chip name instead? If it’s a random pick, things aren’t all that different. Less likely to go to zero, granted, but the odds are still unknowable and so is the payoff.

Now make it a careful, researched selection. The first question is the only one that counts... what are the odds? Look at the fundamentals and ask yourself, of all the stocks that have shown similar fundamentals to the one I like, how many went on to gain x% inside a year? If you can’t answer that, really you’re still gambling. You’re still just hoping to get lucky, just in a nicer suit.

If you can answer it, now you’re making an informed decision. Some people would call that investing. You know your odds, you know your profit target, you know when to bail if it turns sour, and you know when to ring the cash register if it works. The hoping has been replaced by a plan.

So What About Trading?

The first question a good trader asks before risking a cent is this. What’s the risk on this trade, and is the potential reward worth it?

Once we’ve found a high-probability setup we like, the very first thing we define is our stop loss. That’s our line in the sand. The point where we’re happy enough to be proven wrong, take a small loss, and move on without drama.

“Mike, I learned it from you. You always told me this was the rule. Rule number one... throw away your cards the moment you know they can’t win. Fold the hand.”

Jo to Mike McDermott, Rounders

Then we look at our profit target. Support and resistance, volatility, momentum... they all feed into where the trade is likely to give up its gains. If w’re risking 8% on something that may only climb 4% before slamming into resistance, well, we don’t want to be placing bets like that with any regularity. Ugly reward-to-risk is how accounts bleed out slowly while their owners swear they’re being disciplined.

The other question we need to keep asking is bigger than any single trade. What can we expect this system to do for us over hundreds of trades? We want to know that across the long run, our profits will outrun our losses. And yes, there will be losses. Anyone who tells you otherwise is selling something fishy.

Expectancy, The Number That Settles It

The profitability of any trading method over time comes down to one thing. Expectancy. Here’s the formula:

Expectancy = (Probability of a Win × Average Win) − (Probability of a Loss × Average Loss)

Let me show you why this is the most liberating bit of arithmetic a trader ever learns.

Picture a method that wins only 30% of the time. Most people hear that and recoil... wrong seven times out of ten, who’d want that? Stay with me. Say the average winner makes 10% and the average loser drops just 2%. On a $10,000 account:

(30% × $1,000) − (70% × $200) = $160

Every trade, on average, across a large enough sample, adds $160 to your account. You are wrong more than twice as often as you’re right, and you’re still making money. That right there is the single idea the entire “you need a high win rate” industry doesn’t want beginners to understand.

Notice what just happened. The win rate barely matters on its own. What matters hugely is how much you make when you’re right versus how much you give back when you’re wrong. I’m personally happy to be wrong a good chunk of the time, as long as my winners dwarf my losers. The size of the edge does the heavy lifting, not the frequency of being correct.

This is also why nobody walks into their day job each morning praying that today’s the day they’re told they’ve made $10 million. They turn up knowing the odds of the job producing a certain income are high, and they accumulate that income, week after week, paycheque after paycheque. Successful trading runs on exactly the same logic. The recurring income is the point, not praying for a jackpot.

So, Gambling or Not?

Strip it all back and the line between the two is clean.

If you’re in it for the rush, if you’re wishing and hoping on unknowable odds, if your plan is to get lucky and feel that little hit of having gotten away with something... that’s pure gambling, and the casino always wins in the end. The house has expectancy on its side, and you don’t.

But if you know your setup, you’ve defined your risk before you’re in, you take your small losses without flinching, and you understand the expectancy of what you’re doing across hundreds of trades... then it isn’t gambling at all. You’ve simply put the maths on your side, and you’re allowing favourable math to start working its magic. That’s the whole job.

The mate over coffee will probably never call it trading. To him it’s all gambling, and no amount of explanation will shift him. Let it go. There’s no need to “win the argument”.

The only person who has to know the difference is you. And you’ll know it the day you can answer the question a gambler never even thinks to ask: What’s my expectancy?

Gambling is hoping the odds break your way. Trading is knowing they already have… and letting probability work its magic over the longer term. The whole job is getting yourself from the first sentence to the second.

FAQs
 

What’s the actual difference between trading and gambling?
Motivation, intent, and odds. A gambler is chasing an unearned, lottery-style payoff on unknowable odds, for the rush. A disciplined trader takes a high-probability setup, defines the risk before entering, and lets favourable expectancy do its work across hundreds of trades. The casino has expectancy on its side. A good trader has it on theirs. Without that maths in your favour, you’re just a gambler in a slightly nicer suit.

Is buying an ETF or an index fund gambling?
By the strict definition of trading (buying at one price expecting to sell at a higher one later), ETF buyers are absolutely trading. But it isn’t gambling, because the odds aren’t unknowable. Long-term equity returns over decades are well-documented and broadly favourable. Boring, yes, but on the buyer’s side. That’s the opposite of a casino, where the house’s edge guarantees the player loses over time.

What is expectancy in trading?
Expectancy is the one number that tells you whether a trading method makes money over the long run. The formula is (Probability of a Win × Average Win) minus (Probability of a Loss × Average Loss). Positive expectancy means you’re trading. Negative expectancy means you’re gambling, no matter how sophisticated the strategy looks on paper.

Can you make money trading with a low win rate?
Yes, and many of the best traders do exactly that. A method that wins 30% of the time can still print money if the average winner is several times larger than the average loser. I’m personally right about 60% of the time in my trading and still highly profitable, because my average winner is roughly 2.7 times my average loser. The size of the edge does the heavy lifting, not how often you’re right.

Why doesn’t a high win rate matter as much as people think?
Because chasing a high win rate forces you into ugly reward-to-risk setups. Tight stops, premature profit-taking, over-trading to keep the percentage up. The win rate rises but the maths underneath quietly turns against you. Most retail traders who lose money long-term are doing exactly this. They’re not stupid. They’re following a curriculum that doesn’t work.

What’s the first question a trader should ask before any trade?
What’s the risk on this trade, and is the potential reward worth it? Define your stop loss before you click buy. Look at where the trade is realistically likely to give up its gains. If you’re risking 8% on something that might only climb 4% before stalling, walk away. Ugly reward-to-risk is how accounts bleed out slowly while their owners insist they’re being disciplined.

How do I know if my trading method has positive expectancy?
Track every trade. Win rate, average win size, average loss size. Run the formula across at least 50 to 100 trades before you draw conclusions. A handful of trades tells you nothing. A few hundred tells you whether you’ve built something with an edge or whether you’ve been getting lucky and haven’t worked it out yet.

Is trading penny stocks always gambling?
Almost always, yes. The odds of a 10x are unknowable, the payoff is being chased on hope rather than process, and the intent is usually lottery-style. That’s gambling in a slightly more respectable suit. The same is true of any “researched” pick where the trader can’t actually quote the odds of the outcome they’re hoping for.

Thanks for reading. If you want to build this kind of skill set inside a structured, proven framework, Tao of Trading is built for it. Get started at https://www.taooftrading.com/