Week 11: Cryptocurrency Markets

Cryptocurrency markets get their own week not because the underlying ideas change, but because the details do: different exchange structures, different custody risks, and leverage that is often offered at levels a stock broker never would. Every survival mechanism the course has covered — execution friction, forced exits, leverage — shows up here at its most extreme, which is exactly why it’s the last instrument before Week 12’s synthesis. The lecture applies Weeks 1–10’s market-mechanics and risk-and-leverage ideas here rather than starting over.

The question this week answers#

Which of this semester’s ideas about markets, leverage and risk carry straight over to cryptocurrency, and which details actually change?

By the end of this lecture#

• compare a cryptocurrency exchange’s structure to the stock exchange from Week 2
• explain what custody means and why it matters differently here than for stocks
• explain how leverage in crypto markets relates to Weeks 8–9’s margin and leverage mechanics
• calculate a liquidation price for a simulated leveraged crypto position

Key ideas#

A cryptocurrency exchange performs the same core job as the stock exchange from Week 2 — matching buyers and sellers — but typically operates 24/7, with no scheduled close, and often with far less standardisation between platforms than regulated stock exchanges have.

Custody describes who actually controls an asset: on many crypto exchanges, an asset held “in the app” is legally and technically controlled by the exchange, not the trader (exchange custody); an asset moved to a wallet the trader alone controls the keys for is self-custody. This distinction has no direct stock-market equivalent, and it changes what “the position is safe” actually means.

Leverage on crypto exchanges is often offered at ratios far beyond what a stock broker’s margin account allows, using the same underlying logic as Weeks 8–9: more leverage means a smaller price move triggers forced closure. Here that forced closure is usually called a liquidation rather than a margin call, but it’s the identical mechanism — the position is closed once losses consume the margin backing it.

A worked example#

A simulated trader opens a long position on a cryptocurrency priced at $30,000, using 10x leverage, meaning the required margin is one-tenth of the position’s value.

The numbers#

A simplified liquidation-price estimate (ignoring fees and funding costs) for a long position is:

liquidation price ≈ entry price × (1 − 1 ÷ leverage)

For this position:

30,000 × (1 − 1 ÷ 10) = 30,000 × 0.9 = $27,000

A drop of only 10% from the entry price is enough to liquidate a 10x leveraged long — an even smaller move than the 33.3% margin-call trigger from Week 8’s 2x-leveraged stock example, because the leverage ratio here is five times larger. Real platforms’ liquidation formulas include fees and maintenance-margin buffers this simplified version leaves out, but the core relationship — higher leverage means a smaller adverse move causes forced closure — holds regardless.

What a diagram would show#

A concept diagram with two boxes side by side, “exchange custody” and “self-custody,” each listing what the trader does and doesn’t control, making the distinction concrete rather than abstract.

Try it yourself#

The takeaway#

Crypto markets don’t require a new theory of risk — they require applying Weeks 8 and 9’s leverage mathematics to a market where higher leverage ratios and custody arrangements make the same mechanics bite faster and harder. Week 12 is where all of this, across every instrument covered, gets turned into a personal set of rules.