MR. D · BUSINESS EDUCATION

Stock Market Lab

Build a diversified portfolio by choosing one company from each industry. Learn why prices move, then defend every swap with evidence.

No real money is involved. Market data may be delayed.
MRDHQ
Stock Market LabEducational investing simulation

YOUR PORTFOLIO

Learn the market by owning the whole economy.

Each industry receives the same starting allocation. You choose one company per industry and may only swap into another company from that same industry.

Portfolio value$15,000.00$0.00 · 0.00%
Starting capital$15,000
Industries filled0 / 10
Decisions logged0
Market pricingClassroom fallback

DIVERSIFICATION

Industry allocations

$1,500 is reserved for each industry. Fractional shares let the full allocation work.

COMPANY PASSPORTS

Research before you invest.

Compare recognizable companies within the same industry. Prices use the shared classroom market snapshot when available. The fallback values are used only if the shared feed is unavailable.

DECISION JOURNAL

Your reasoning matters more than guessing.

Every initial pick and stock swap becomes part of your investing record.

STOCK MARKET 101 · REQUIRED

Understand the game before you build.

Learn the basic idea, see how a business reaches the stock market, then pass the quick check to unlock portfolio selections.

ELI5 · TAP THROUGH

How does a business become something people can invest in?

Start with a person who has an idea for a product or service.

1 / 8
01

What is a stock?

A share is a small piece of ownership in a company.

02

Price ≠ company value

A $5 share is not automatically cheaper than a $100 share. The number of shares matters too.

03

Why prices move

Buyers and sellers react to results, news, expectations, products, competition and the economy.

04

Your strategy

Research companies, spread risk across industries, watch what changes and explain your decisions.

05

This simulation

You receive classroom money, choose companies by industry and track how those choices perform. No real money is involved.

06

Where this can go

Over several years, a business may grow, struggle, raise more money, buy competitors or change completely. Investors keep reassessing what its future may be worth.

DON'T GET FOOLED BY SHARE PRICE

Which company is worth more?

Company A1 million shares × $100$100 million company value
Company B100 million shares × $5$500 million company value

Company B has the lower stock price but the larger market value. One share's price alone does not tell you how valuable the whole company is.

8 QUESTION UNLOCK

Ready to build your portfolio?

Score 6 out of 8 to unlock company selections. You can retry immediately.

TEACHER CONTROL CENTER

Stock Market Lab controls

V1 teacher controls are scaffolded here. Student writes use a separate Stock Lab namespace from Business Canvas data.

Competition

Next build

Class/block filters, event windows, leaderboard controls, stock-universe editing, CSV exports, and reset tools plug into this panel without changing the student portfolio model.