User Story
As a player, I want to compare my performance to the market so that I understand relative success.
Acceptance Criteria
- Sharpe ratio calculated for:
- Player portfolio
- Market benchmark (e.g., average of all stocks)
- Displayed side-by-side
- Updates dynamically
- Handles edge cases (division by zero, no trades)
User Story
As a player, I want to compare my performance to the market so that I understand relative success.
Acceptance Criteria