Three meanings that need different data
Choose the measurement before opening a chart. A bond spread describes yield compensation against a benchmark; an option spread describes a position; a curve slope compares maturities. Similar names do not make their units, risks or inputs interchangeable.
- Hypothetical option example: sell one 100-strike put for $2.00 and buy one 95-strike put for $0.80, with the same underlying, expiry and assumed 100-share multiplier. The opening credit is ($2.00 - $0.80) × 100 = $120 before costs. It is not 120 basis points of bond OAS.
- The two-leg expiry payoff has a maximum loss of ($5.00 - $1.20) × 100 = $380 before costs, assuming both legs settle as modeled. Early assignment, exercise decisions and execution can create different interim exposures. A macro OAS chart cannot price these legs.
| Task | Required inputs | What the result means |
|---|---|---|
| Bond credit spread or OAS | Bond/index definition, currency, benchmark curve and spread methodology | A yield spread expressed in percent or basis points |
| Option credit spread | Long and short option contracts, strikes, expiry, premiums and multiplier | A position opened for a net credit, with contract-specific payoff and assignment risk |
| Treasury curve slope | Two Treasury yields at different maturities on a common date | A maturity differential such as 10Y minus 2Y |