# Platform Spec

- [Portfolios](/platform-spec/portfolios.md): Portfolios are risk boundaries of assets & liabilities
- [Risk Framework](/platform-spec/risk-framework.md)
- [Market Risk](/platform-spec/risk-framework/market-risk.md)
- [Rebalancing (Liquidation)](/platform-spec/risk-framework/rebalancing-liquidation.md)
- [Preventing Bad Debt](/platform-spec/risk-framework/preventing-bad-debt.md)
- [Composite Operations](/platform-spec/composite-operations.md)
- [Pricing Engine](/platform-spec/pricing-engine.md): How does Concordia collect and stream real-time prices