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The mechanics, explained properly.

Reference guides to the parts of options trading and account structure that are usually explained badly — written for people who want the actual mechanism, not a metaphor.

General information only. Nothing here takes account of your objectives, financial situation or needs.

Options basics

What is an option? Calls, puts and how ASX contracts work
The contract itself: what a call and a put actually oblige, what you pay for, and what an ASX-listed option covers.
Reviewed 8 September 2026

Volatility

Implied volatility and IV rank explained
Why the same IV reading means different things on different stocks, and what IV rank adds that a raw percentage cannot.
Reviewed 8 September 2026

Margin & risk

How ASX options margins work: SPAN, premium and total margin
Why writing options creates a daily margin obligation, how ASX Clear calculates it, and what can force a margin call.
Reviewed 8 September 2026

Accounts & ownership

What is a HIN? CHESS sponsorship and broker transfers
How CHESS-sponsored ownership is recorded, how a HIN differs from an SRN, and the usual broker-transfer steps.
Reviewed 17 July 2026
The Macquarie Cash Management Account explained
What the linked settlement account does, how it differs from a HIN, and what moves when you change brokers.
Reviewed 17 July 2026

The mechanics, explained properly.

Options basics

What is an option? Calls, puts and how ASX contracts work

Volatility

Implied volatility and IV rank explained

Margin & risk

How ASX options margins work: SPAN, premium and total margin

Accounts & ownership

What is a HIN? CHESS sponsorship and broker transfers

The Macquarie Cash Management Account explained