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PART VIII — ECONOMICS🟢 Beginner

Why Do Prices Rise When Supply Runs Low?

Supply & Demand

Prices are set where quantity demanded meets quantity supplied — the market equilibrium that governs every commodity, asset, and interest rate in finance.

economicsmicroeconomicsequilibriumpricesupplydemand

Live Result

ƒ: quantity_supplied - quantity_demandedraw: 0.00000

ƒ(x)

Use variable names from the panel above (e.g. FV, r, n) — or type numbers directly: 10000 / (1 + 0.08)^10

quantity_demanded$

Units buyers want at the current price

quantity_demanded = 30000

quantity_supplied$

Units sellers offer at the current price

quantity_supplied = 30000

price

Market price of the good ($)

price = 6

max_willingness_to_pay

Highest price any buyer would pay ($)

max_willingness_to_pay = 9

💡 You can also enter values directly in the formula: 10000 / (1 + 0.08)^10

⬇ Export Calculation

Exports a plain .txt file with your expression, formula, all variable values, result, and educational notes — ready to paste into any report, Word doc, Notion, or Google Docs.

The exported file includes the formula in standard mathematical notation — you can paste it directly into Excel, Google Sheets, or back into FinanceSheep.

📖

Learn: Supply & Demand

PART VIII — ECONOMICS · Educational Guide

The Core Idea

Every market — corn futures, Treasury bonds, office space — is governed by the same law: the price adjusts until quantity demanded equals quantity supplied. This equilibrium point is where markets clear, and understanding it is the foundation of both microeconomics and asset pricing.

How It Works

Demand slopes downward: as price rises, buyers want less. Supply slopes upward: as price rises, sellers produce more. Equilibrium is where the two curves intersect — the price at which the market clears. Any price above equilibrium creates a surplus (unsold goods, price falls). Any price below creates a shortage (buyers outbid each other, price rises). The market self-corrects.

💡

Real-World Example: At $6.00/bushel, Jake supplies 30,000 bu and the local grain elevator demands 30,000 bu — perfect equilibrium, zero surplus. If drought cuts supply by 20% to 24,000 bu while demand stays at 30,000, there's a shortage of 6,000 bu. Buyers bid the price up to ~$7.50 until a new equilibrium is found. Consumer surplus at $6.00: 0.5 × ($9 max − $6 price) × 30,000 bu = $45,000 of value buyers receive above what they pay.

Why Do Prices Rise When Supply Runs Low?

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