Foundations Path

A **derivative** is a financial instrument whose value is derived from an underlying asset, index, or interest rate. The four main types are **futures**, **forwards**, **options**, and **swaps**. Some trade on organised exchanges (futures, listed options), others over-the-counter (OTC) between private counterparties. Market participants use derivatives to **hedge risk**, **speculate** on price movements, and **exploit arbitrage** opportunities. The 2025 BIS Triennial Survey put the notional value of outstanding OTC derivatives at US$846 trillion in mid-2025, one of the largest segments of the global financial system.

**Hedging** uses derivatives to offset a **pre-existing exposure**, reducing the variance of future cash flows. **Speculation** uses derivatives to take a **new directional position**, increasing exposure in exchange for expected return. The same instrument can serve either purpose, the difference lies in what the trader already owns. Hull frames a third role, **arbitrage**, which locks in riskless profit when prices deviate from no-arbitrage relationships. Together, hedgers, speculators, and arbitrageurs supply the liquidity, depth, and price discovery that derivatives markets require.

**Exchange-traded** derivatives are **standardised** contracts that trade on an organised venue (ASX 24, CME, EUREX) with a **central counterparty** clearing every trade. **Over-the-counter** (OTC) derivatives are privately negotiated bilateral contracts, customisable in size, tenor, and underlying, but historically exposed to **bilateral counterparty risk**. Since the G20 Pittsburgh reforms of 2009, **standardised OTC** products such as plain-vanilla interest rate swaps must be **centrally cleared** and reported to **trade repositories**, narrowing the gap between the two segments.

**Counterparty credit risk** (CCR) is the risk that the other party to a derivative contract defaults before the final settlement of cash flows. Unlike straight loan credit risk, CCR is **bilateral** and **stochastic** because the mark-to-market value, and therefore the exposure, fluctuates with market prices. The risk is most severe in **OTC** markets and is mitigated through **central clearing**, **initial and variation margin**, **netting agreements** under an ISDA Master, and post-GFC regulatory reforms.

A **clearing house**, formally a **central counterparty** (CCP), legally interposes itself between buyer and seller in every cleared trade. Through **novation** it becomes the buyer to every seller and the seller to every buyer, so neither original party faces the other's credit risk. The CCP manages this risk with **initial margin**, **variation margin**, a **default fund**, and a published **default waterfall**. In Australia, exchange-traded futures and ETOs clear through **ASX Clear (Futures)** and **ASX Clear** respectively, both supervised by ASIC and the RBA.

**Novation** is the legal process by which an original bilateral contract between two parties is **extinguished and replaced** by two new contracts, each with the **central counterparty** as one side. After novation, the buyer faces only the CCP and the seller faces only the CCP. Bilateral counterparty risk is replaced by exposure to a single, highly regulated entity. Novation is automatic on exchange-cleared trades and increasingly common in the OTC market after the G20 Pittsburgh 2009 reforms. The ISDA 2002 Novation Agreement provides the standard template for bilateral OTC novations.