Week 1: Welcome to the Market

An orientation lecture, but on a specific problem: a small account doesn’t just have less money, it has less room to be wrong — the same drawdown, cost or forced exit that a large account shrugs off can end a small one’s ability to keep trading at all. Before that problem can be worked through in numbers, it needs the basic vocabulary of what a market is and which asset classes the semester will touch — stocks, futures, options, cryptocurrency — covered here as supporting orientation, not as the week’s actual subject.

The question this week answers#

Why does a small account need twelve weeks of its own course, rather than just “trading, but with less money” — and what is a market actually doing when it “sets a price” in the first place?

By the end of this lecture#

• state the small-account problem: why limited capital narrows the room for error that a drawdown, a cost, or a forced exit leaves behind
• describe a market as a mechanism that matches buyers and sellers, not a force with opinions of its own
• name the asset classes this course covers, in the order it covers them
• list what to have ready before Session 1

Key ideas#

The small-account problem: a $1,000 account and a $1,000,000 account can face the identical percentage drawdown, cost, or margin call, and come out in completely different positions — the smaller account has less buffer before a loss becomes unrecoverable or a broker forces a position closed. This course assumes a small account throughout, on purpose: it’s the case where execution, sizing and risk mistakes show up fastest and matter most.

A market exists wherever there’s a standing way for buyers and sellers to meet and agree on a price — an exchange for stocks, a venue for futures and options, an app for cryptocurrency. Nothing about a market guarantees a “correct” price; it only produces the price the last willing buyer and seller agreed to.

This course covers five broad asset classes, introduced in this order: stocks (Weeks 2–7), leveraged stock positions via margin and short selling (Week 8), futures (Week 9), options (Week 10), and cryptocurrency (Week 11). That ordering isn’t arbitrary — each week adds one new piece of complexity (leverage, then a contract obligation, then a non-linear payoff) on top of mechanics already covered, which is why later weeks keep referring back to earlier ones.

The course’s central question, stated plainly: how does a small account survive execution friction, drawdowns, leverage and increasingly complex instruments — not just “which direction did the price go,” but what mechanically ends a position, or an account, before that question even gets answered. Week 1 can only state that question; Weeks 5 onward are where it gets worked through in numbers.

A worked example#

Two students in a simulated market: one is willing to sell a share of a hypothetical company “Northbank Traders” for $37.50, the other is willing to pay up to $37.80. No trade happens until one of them agrees to the other’s number — say the buyer accepts $37.50. That single agreed price is now “the market price,” at least until the next trade. Nothing else was involved: no committee set that number, and it says nothing yet about whether $37.50 is good value.

The numbers#

If a student has $1,000 to spend and Northbank Traders trades at a simulated $37.50 a share:

1,000 ÷ 37.50 = 26.67

Shares can’t be bought in fractions on a typical stock order, so the affordable amount rounds down to 26 shares, costing $975.00 and leaving $25.00 uninvested. That leftover cash is a recurring, unglamorous fact of trading in whole shares — it comes back when position sizing is covered properly in Week 5.

What a diagram would show#

A process flow diagram: a buyer box and a seller box, both feeding into a single “matched price” box, with a short label noting that the match only happens when a buyer’s maximum and a seller’s minimum overlap. It’s a one-mechanism diagram, useful precisely because Week 1 shouldn’t try to show more than that.

Try it yourself#

The takeaway#

A small account has less room to be wrong than a large one, and a market is a matching mechanism, not an oracle — neither fact is optional background. Everything else this semester is really a question of what happens around that one matched price: how it’s reached and what it costs to reach (Week 2), what to do with the observations it produces (Weeks 3–4), and how much of your own capital to risk, and how, before that price can end your position for you (Week 5 onward).