What Happens to Your Money When You Buy a Stock?

I clicked "buy" on Trading 212 for the first time and wondered: where does my money actually go? Is it funding the company? Going to the previous owner? Getting eaten by some invisible middleman? Turns out, it's way more complicated (and interesting) than I thought.

What Actually Is a Stock Share?

A share is literally a piece of a company. Imagine your school splitting into 1,000 equal pieces and selling them off. If you bought 10 pieces, you'd own 1% of the school. You'd get a vote on big decisions and a claim on any profits.

That's exactly what a stock is. When you own 100 shares in Apple, you own 100 tiny pieces of Apple. You get:

• A claim on profits: If Apple makes billions in profit, a tiny bit of that is technically yours (though they usually reinvest it)
• Voting rights: You can vote on company decisions (though with 100 shares out of billions, your vote is basically a rounding error)
• Potential growth: If Apple becomes more valuable, your shares become more valuable
• Risk exposure: If Apple tanks, your investment tanks too

There are also dividend stocks, where companies pay shareholders cash regularly. But that's another post.

Where Does Your Money Actually Go?

Here's the mental shift that confused me: your money doesn't necessarily go to the company.

When a company first goes public (IPO = Initial Public Offering), they sell shares directly to investors. That money goes to the company. They use it to build factories, hire people, research new products — actual stuff.

But after that IPO? You're almost never buying directly from the company. You're buying from other investors who already own shares.

This is actually brilliant for companies — they can raise money once during an IPO, then their shares trade forever without them doing anything. Wild.

Enter the Market Makers (the Invisible Middlemen)

So if I'm selling and you're buying, how do we find each other? That's where market makers come in.

A market maker is basically a financial institution that guarantees liquidity. They buy stocks from people trying to sell, and sell stocks to people trying to buy. They pocket the difference (called the "bid-ask spread").

This happens thousands of times per second. Market makers don't really "own" stocks long-term — they're just the pump that keeps the market flowing. On Freetrade or Trading 212, the spreads are tiny for popular stocks, but they're still there.

Why Do Stock Prices Move?

Stock prices aren't set by the company. They're set by supply and demand — just like a Depop listing.

If everyone thinks Apple will do well, more people want to buy than sell. Price goes up. If everyone thinks Apple is overpriced, more people want to sell than buy. Price goes down.

This is why stock prices seem random sometimes. The market is literally just thousands of people arguing about what a company is worth, moment by moment. Sometimes that's based on earnings. Sometimes it's based on vibes.

Paper Gains vs Realised Gains

This is crucial to understand, and I got it wrong at first.

Paper gain: You bought Tesla at £100/share. It's now £150/share. You're up £50 per share. That's a paper gain. It only exists on your screen. If you sell right now, it becomes real.

Realised gain: You sell that Tesla at £150/share. The money hits your account. That's your realised gain. It's real.

A lot of beginning investors get attached to paper gains. "Oh look, I'm up £2,000!" But that money doesn't exist until you sell. If the stock crashes before you sell, that paper gain vanishes.

This is also why long-term investing works — you let your paper gains compound into massive realised gains. You don't get tempted to sell every time there's a dip.

The Chain Reaction: How a Stock Purchase Actually Works

Let me walk through exactly what happens when you click "buy" on Trading 212:

Why This All Matters

Understanding the mechanics changes how you invest:

• Your money funds previous investors, not (usually) the company. So buying popular stocks doesn't mean you're "supporting" the company — you're just trading with other investors.
• Prices are opinions, not facts. They move on supply and demand, which is based on sentiment. This is why you can lose money in a good company if the market loses faith.
• Paper gains are delicious lies. They feel real but they're not. Only realised gains count. This is why day traders are emotional wrecks — they're chasing the paper dragon.
• Market makers are just friction. They take a tiny cut, but they also ensure you can actually buy and sell whenever you want. That's valuable.
• Holding long-term defeats emotions. When you understand that today's price is just someone's opinion, it's easier not to panic when prices dip. Compound interest loves long-term holders.

A Real Example: My First Stock Trade

I bought 5 shares of Kraken Robotics at £1.20. That £6 went to whoever was selling. Kraken didn't get it. Some market maker took 0.01p. I got 5 tiny pieces of a company building underwater robots.

A week later, it rose to £1.50. Paper gain: £1.50. I didn't sell.

A month later, it dropped to £0.80. Paper gain disappeared. Still didn't sell.

The price moves because people are constantly changing their opinion on whether underwater robots are going to make money. My ownership didn't change. The company didn't change. The market's opinion changed.

This is exactly why index funds are better for most people — you're not trying to predict whether market opinions will be right or wrong. You own a bit of everything, ride the long-term wave, and let compound interest do the work.