TL;DR
A strategy profile where no player can improve their payoff by unilaterally changing their strategy. Formally, for each player i: \( u_i(s_i^*, s_{-i}^*) \geq u_i(s_i, s_{-i}^*) \) for all \( s_i \).
Nash Equilibrium
A strategy profile where no player can improve their payoff by unilaterally changing their strategy. Formally, for each player i: \( u_i(s_i^*, s_{-i}^*) \geq u_i(s_i, s_{-i}^*) \) for all \( s_i \).
Why it matters for interviews
Game theory questions in quant interviews often ask candidates to find Nash equilibria in trading games, auction settings, or market-making scenarios. Understanding equilibrium concepts is essential for strategic reasoning.
Definition and Mathematical Foundation
A strategy profile where no player can improve their payoff by unilaterally changing their strategy. Formally, for each player i: \( u_i(s_i^*, s_{-i}^*) \geq u_i(s_i, s_{-i}^*) \) for all \( s_i \).
Application in Quantitative Finance
Game theory questions in quant interviews often ask candidates to find Nash equilibria in trading games, auction settings, or market-making scenarios. Understanding equilibrium concepts is essential for strategic reasoning.
Related Concepts
Related Terms
Ready to practice for the Quant Trading Interview?
Adaptive practice powered by Item Response Theory targets your weak areas. Start with 3 free sessions.
Start free practice →