Last Updated on October 31, 2025 by Admin
| Index | Name | Upper Case | Lower Case | Common Usage |
|---|---|---|---|---|
| 1 | Alpha | Α | α | Coefficient, excess return (“alpha”) |
| 2 | Beta | Β | β | Market sensitivity (“beta”) |
| 3 | Gamma | Γ | γ | 2nd derivative in Black-Scholes (rate of change of delta) |
| 4 | Delta | Δ | δ | Sensitivity of option price to underlying asset |
| 5 | Epsilon | Ε | ε | Error term, small number, strain |
| 6 | Zeta | Ζ | ζ | Damping ratio, Riemann zeta function |
| 7 | Eta | Η | η | Efficiency, viscosity |
| 8 | Theta | Θ | θ | Option time decay (in BSM), angle in trig |
| 9 | Iota | Ι | ι | Rarely used, small quantity |
| 10 | Kappa | Κ | κ | Curvature, elasticity, rate constants |
| 11 | Lambda | Λ | λ | Eigenvalue, wavelength, leverage |
| 12 | Mu | Μ | μ | Mean (expected value), micro- prefix (µm), coefficient of friction |
| 13 | Nu | Ν | ν | Frequency, kinematic viscosity |
| 14 | Xi | Ξ | ξ | Random variable, complex variables |
| 15 | Omicron | Ο | ο | Rarely used (looks like “O”) |
| 16 | Pi | Π | π | Product operator, 3.14159…, profit |
| 17 | Rho | Ρ | ρ | Option sensitivity to interest rate, density |
| 18 | Sigma | Σ | σ | Summation operator (uppercase), volatility (lowercase) |
| 19 | Tau | Τ | τ | Time constant, torque |
| 20 | Upsilon | Υ | υ | Particle physics, upsilon meson |
| 21 | Phi | Φ | φ | Golden ratio, potential function, phase angle |
| 22 | Chi | Χ | χ | Chi-squared distribution, characteristic functions |
| 23 | Psi | Ψ | ψ | Wave function in quantum mechanics |
| 24 | Omega | Ω | ω | Ohm (resistance), angular velocity, last letter (symbolic “end”) |
