Race $10,000 in practice funds to $20,000.

What is a stock?

5-minute read · Practice only — not investment advice

A stock is a slice of ownership in a company. When you buy one share of a business, you become a tiny part-owner of it — entitled to a fraction of its profits, a vote on big decisions, and a share of whatever is left if the company is ever sold. That is the entire idea, and everything else in the stock market is built on top of it.

Companies sell stock to raise money. Imagine a business that needs $100 million to build factories. It could borrow the money and pay interest, or it could sell a million slices of itself at $100 each and never have to pay it back. Investors accept the trade because if the company grows, their slices become worth more — and the company accepts it because the money comes with no repayment schedule. Both sides are betting on the future, just from opposite ends.

Those slices trade on stock exchanges — marketplaces like the NYSE and Nasdaq where buyers and sellers meet electronically. Here is the part most beginners miss: when you buy a stock, you are almost never buying it from the company. You are buying it from another investor who decided to sell. The company got its money years ago, at the IPO. Everything since is investors trading slices among themselves, which is why prices can move on pure sentiment — the company itself hasn’t changed, but the crowd’s opinion of it has.

So why do prices move at all? In the short run, a stock price is a popularity contest mixed with a prediction market. Every buyer is saying "I think this will be worth more later" and every seller is saying the opposite, and the price is simply where they meet. Earnings reports, product launches, economic news, even a CEO’s tweet — all of it matters only insofar as it changes what the crowd expects. A company can announce record profits and still fall 8% in a day if everyone expected even more record profits.

Some stocks also pay dividends — regular cash payments to shareholders from company profits. Think of it as the company sharing the harvest. Not all companies pay them; fast-growing businesses usually reinvest every dollar instead. Dividends are nice, but they are not free money: on the day a dividend is paid, the stock price typically drops by about the dividend amount. What matters is total return — price change plus dividends — not either one alone.

The risk, stated plainly: a stock can go to zero. If the company fails, your slices are worthless and nobody owes you anything — shareholders are last in line behind lenders and employees. That is the deal, and it is why the later lessons on diversification and position sizing exist. But it is also why stocks have historically been the highest-returning mainstream investment over long periods: you are paid for bearing exactly this risk. On MyMockfolio, you get to feel all of this — the rallies, the drops, the temptation to panic-sell — with practice funds, where the tuition is free.

How to read a stock quote

5-minute read · Practice only — not investment advice

A stock quote looks like alphabet soup the first time you see one: symbols, decimals, percentages, abbreviations. But it is really just an ID card with a price tag, and you only need to understand about six fields to read 90% of it. Let’s walk through them using a typical quote screen.

First, the ticker symbol — the stock’s short code, like AAPL for Apple or TSLA for Tesla. Symbols exist because company names are long and exchanges needed something computers could shout quickly. Next to it sits the price: the last price at which a buyer and seller agreed to trade. It is a historical fact about one transaction, not a promise about the next one — a distinction that matters more than it sounds.

Beside the price you will usually see the day’s change, shown as dollars and percent — how far the price has moved since yesterday’s close. A stock "up 2.3%" simply means it costs 2.3% more than it did at yesterday’s closing bell. Beginners obsess over this number; experienced traders treat it as weather. It tells you what happened, not what happens next. (On MyMockfolio’s trade desk you’ll see the delayed price and its timestamp instead — the refresh rhythm is every 15 minutes, which is plenty for practice.)

Two numbers most beginners ignore are bid and ask. The bid is the highest price any buyer currently offers; the ask is the lowest price any seller currently accepts. The gap between them — the spread — is a tiny toll you pay on every trade. On heavily traded stocks the spread is pennies; on thin, quiet ones it can be wide enough to matter. When you place a market order, you buy at the ask and sell at the bid, so the spread is working against you twice.

Volume tells you how many shares changed hands today. High volume means lots of disagreement and conviction — big news days have big volume. Low volume means nobody cares much right now, and prices can drift on tiny trades. Then there is market cap: share price times total shares outstanding, i.e. what the market thinks the whole company is worth. A $50 stock of a company with a billion shares ($50B market cap) is "bigger" than a $500 stock with ten million shares ($5B). Beginners often assume the higher-priced stock is the bigger company. It isn’t — price per share is arbitrary; market cap is the real size.

You will also see ratios like P/E (price divided by annual earnings per share). A P/E of 20 means investors pay $20 for every $1 of yearly profit — loosely, how many years of current profits the price "contains." High P/E means high expectations; low P/E means low expectations or a bargain, depending on who you ask. Treat ratios as conversation starters, not verdicts.

What should a beginner actually watch? Three things: the price trend over weeks (not minutes), the volume on big-move days, and why it moved — the news behind the number. Anyone can read a quote; the skill is reading the story. That is what the deep-dive page on the guided buy flow is training you to do, one stock at a time.

Diversification basics

5-minute read · Practice only — not investment advice

"Don’t put all your eggs in one basket" is the oldest investment advice there is, and it survives because the math behind it is unbreakable. If you put your entire portfolio in one stock and that company has a terrible year, your portfolio has a terrible year — there is nowhere to hide. Split the same money across ten unrelated investments and one disaster becomes a bad week instead of a catastrophe. Diversification does not make the bad thing less likely; it makes it matter less.

The key word most beginners miss is unrelated. Owning five tech stocks is not diversification — when tech sells off, they tend to fall together, because they answer to the same economic forces. True diversification means owning things that zig when others zag, or at least zig independently: different industries, different company sizes, sometimes different countries. The technical term is correlation — how closely two investments move together — and building a resilient portfolio is largely an exercise in collecting low correlations.

This is where ETFs earn their reputation. A single share of SPY instantly spreads you across 500 large US companies; QQQ does the same for the 100 biggest Nasdaq names. One purchase, hundreds of baskets for your eggs. That is why ETFs are often the first thing a new investor buys and the last thing an old investor sells — they are diversification in a wrapper. Notice the trade-off, though: you will never beat the market with an index ETF, because you are the market. Diversification smooths the ride; it does not supercharge it.

How diversified is diversified enough? For practice purposes, somewhere between 5 and 15 genuinely different positions captures most of the benefit — beyond that, each new holding adds complexity faster than it removes risk. A tidy beginner practice portfolio might be: one broad ETF as the core, plus a handful of single stocks in different industries you actually follow. Then watch a red day roll through and notice how the ETF cushions the single-stock swings. That feeling — the portfolio moving less violently than its scariest holding — is diversification working.

One honest caveat: diversification cannot protect you when everything falls at once. In a true market panic, correlations spike toward one and nearly all stocks drop together — 2008 and the 2020 COVID crash both did this. Diversification is protection against being wrong about a company, not about the world. Knowing which risk you are actually hedging is, itself, an advanced lesson — and now you have had it for free.

Position sizing and risk

6-minute read · Practice only — not investment advice

Ask a room of beginners what determines trading success and they will say "picking winners." Ask professionals and they will say "position sizing" — deciding how much of your money each idea gets. The uncomfortable reason: even great traders are wrong nearly half the time. What separates them is not clairvoyance; it is that their winners are sized to matter and their losers are sized to survive. Sizing is the steering wheel. The stock pick is just the engine.

Let’s make it concrete. You have $10,000 in practice funds. A stock trades at $120 and you buy 25 shares — that is $3,000, or 30% of your portfolio on one idea. If the stock drops 10%, you lose $300, which is 3% of everything you own. Now run the same trade at 5 shares: $600, or 6% of your portfolio, and the same 10% drop costs you $60 — barely a scratch. Identical stock, identical 10% move, five times the pain. Nothing changed except the size, which means size was the decision.

Professionals often flip the question around: instead of "how much should I buy?", they ask "how much am I willing to lose on this idea?" Suppose your answer is $200 — about 2% of a $10,000 portfolio, a common ceiling. If you plan to sell if the stock drops 10% from your entry (your stop point), then the math is simple: $200 of risk ÷ 10% stop = a $2,000 position. The stop distance and the position size are two halves of one equation. Wider stop, smaller size; tighter stop, larger size — same $200 at risk either way. This is the actual arithmetic of risk management, and it fits on an index card.

There is also a piece of math every trader should feel in their bones: losses are asymmetric. Lose 50% of your portfolio and you need a 100% gain just to get back to even. Lose 20% and you need 25%. Small losses are annoyances; big losses are holes you may never climb out of — which is why the first rule of sizing is really about avoiding the kind of loss that ends the game. In Race mode on MyMockfolio, one oversized disaster can cost you days on the leaderboard. In real life, it can cost you years.

How do you practice this? Start every trade on MyMockfolio by stating two numbers before you buy: the percentage of your portfolio this order represents, and the price at which you would admit you were wrong. The guided buy flow’s checklist already asks for the first; add the second yourself in a notes app. Do it for twenty trades and sizing stops being a calculation — it becomes an instinct. That instinct, built with practice funds, is one of the few things in trading that transfers directly to real money later.

What is paper trading and why it works

5-minute read · Practice only — not investment advice

Paper trading means practicing trading with simulated money — "paper" because in the old days traders literally wrote hypothetical trades on paper and tracked them by hand. The money isn’t real, the prices are, and everything else — the decisions, the research, the waiting — is as close to the real thing as you can get without risking a dollar. MyMockfolio is a paper-trading platform: $10,000 in practice funds, real delayed market prices, zero financial risk.

What does it actually teach? More than most people expect. First, the mechanics: placing orders, reading quotes, understanding what "10 shares at $240" does to your cash balance. Every beginner fumbles these at first, and fumbling with practice funds costs nothing. Second, process: paper trading is where you build habits like position sizing, keeping a checklist, and writing down why you bought something — the unglamorous routines that separate consistent traders from gamblers. Third, strategy testing: got a theory ("buy dips in big tech")? Run it for fifty paper trades and look at the results before trusting it with a cent.

Now the honest limitation, because there is a big one: paper trading cannot teach you how real money feels. A 10% paper loss is a shrug; a 10% real loss is a stomachache, and stomachaches make people sell at the worst moment. Psychologists call this loss aversion, and no simulation fully reproduces it. Anyone who tells you paper trading is identical to real trading is selling something. It is a flight simulator: it teaches you to fly the plane, not how turbulence feels.

So how do you paper trade well? Treat it seriously — that is the whole trick. Trade sizes you could actually afford, not fantasy all-in bets. Keep a simple journal: date, what you bought, why, and what happened. Review it weekly; your own past decisions are the best textbook ever written. And give strategies time: ten trades proves nothing, but fifty starts to show whether an approach has an edge or you just got lucky. MyMockfolio’s Race mode is built for exactly this — doubling $10,000 takes enough trades that luck alone rarely suffices.

A final thought on who this is for. Paper trading used to be the domain of finance students and aspiring professionals. Today it is for anyone who has ever wondered "how would I do?" — the curious teenager, the employee with a 401(k) they have never looked at, the person who finds markets fascinating but terrifying. Curiosity is the right reason to start. Practice funds make it a safe one. And if you ever do trade real money someday, you will arrive with something most beginners lack: a process, a journal, and fifty practice trades of scar tissue — all earned for free.