Finance
Derivatives
Financial contracts based on underlying assets — options, futures, swaps
Derivatives are financial contracts whose value derives from underlying assets (stocks, bonds, commodities, currencies, indexes). Major types: (1) Futures: agreement to buy/sell at future date, set price. (2) Options: right (not obligation) to buy/sell. Calls (right to buy), puts (right to sell). (3) Swaps: exchange cash flows. Interest rate swap most common. (4) Forwards: customized OTC futures. Functions: hedging (risk management), speculation, arbitrage. Risks: leverage, complexity, counterparty risk. Major role: 2008 financial crisis (CDS, MBS). Highly regulated.
- DefinitionContract value derived from underlying asset
- Major typesFutures, options, swaps, forwards
- OptionsCalls (buy right), puts (sell right)
- FunctionsHedging, speculation, arbitrage
- Major userBanks, corporations, hedge funds, governments
- Notional valueTrillions; massive market
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Why derivatives matter
- Risk management. Hedging tools.
- Capital markets. Major component.
- Corporate finance. Hedging operations.
- Investment. Sophisticated strategies.
- Pricing financial assets. Black-Scholes.
- Banking. Major business.
- Macro stability. Or instability.
Common misconceptions
- Always speculative. Many used for hedging.
- Always risky. Reduces or transfers risk.
- Just for professionals. Increasingly retail.
- Caused 2008. Contributed; broader financial fragility.
- Always small market. Notional values massive.
- Easy to use. Complex; need understanding.
Frequently asked questions
What are derivatives?
Financial contracts deriving value from underlying assets. Underlying could be: stocks, bonds, commodities (oil, gold), currencies, interest rates, indexes. Derivative value: function of underlying's price. Examples. Stock options: value depends on stock price. Wheat futures: value depends on wheat price. Foreign exchange forwards: depends on currency rates.
What's an option?
Right (not obligation) to buy or sell underlying at specified price by specified date. Two types. (1) Call option: right to buy. Value rises when underlying rises. (2) Put option: right to sell. Value rises when underlying falls. Pay premium for right. American: exercise anytime. European: only at expiration. Used for: speculation, hedging, leverage.
What's a futures contract?
Agreement to buy/sell asset at future date, set price. Standardized; traded on exchanges. Examples. (1) Oil futures: locks in oil price. (2) Stock index futures: bet on market direction. (3) Currency futures: hedge exchange rate risk. Daily settlement (mark-to-market). Margin requirement: not full price. Leverage common. Speculative or hedging use.
What's a swap?
Exchange of cash flows. Most common: interest rate swap. Two parties exchange fixed for floating rate payments. Applications. (1) Interest rate swap: company with floating rate loan wants fixed; swaps with another. (2) Currency swap: exchange flows in different currencies. (3) Credit default swap (CDS): insurance against default. Major OTC market. CDS played role in 2008 crisis.
How are options priced?
Black-Scholes-Merton model (1973). Foundation of options pricing. Inputs: stock price, strike price, time to expiration, risk-free rate, volatility. Outputs: theoretical option value. Real prices may deviate (volatility "smile"). Black, Scholes, Merton Nobel 1997. Used widely. Despite limitations, transformed options markets.
What's hedging?
Reducing risk through derivatives. Examples. (1) Airline buys oil futures — locks in fuel costs. (2) Multinational uses currency forwards — protects against FX swings. (3) Investor buys put options — protects portfolio. (4) Farmer sells crop futures — locks in price. Hedging: trades return for risk reduction. Different from speculation (taking on risk for return).
What was 2008's role?
Major. Subprime mortgages packaged into mortgage-backed securities (MBS). MBS sliced into tranches; rated by agencies. Collateralized debt obligations (CDOs): combined MBS. Credit default swaps (CDS): insured against default. AIG: massive CDS exposure; bailed out. Complexity hid risks. Result: financial crisis. Lessons: regulation (Dodd-Frank), transparency, central clearing.