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docs/execution-services/portfolio-manager/README.md

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+# Portfolio Manager
+
+## Overview
+The Portfolio Manager service will provide comprehensive position tracking, portfolio analysis, and management capabilities for the stock-bot platform. It will maintain the current state of all trading portfolios, calculate performance metrics, and support portfolio-level decision making.
+
+## Planned Features
+
+### Position Management
+- **Real-time Position Tracking**: Accurate tracking of all open positions
+- **Position Reconciliation**: Validation against broker records
+- **Average Price Calculation**: Tracking of position entry prices
+- **Lot Management**: FIFO/LIFO/average cost basis tracking
+- **Multi-currency Support**: Handling positions across different currencies
+
+### Portfolio Analytics
+- **Performance Metrics**: Return calculation (absolute, relative, time-weighted)
+- **Risk Metrics**: Volatility, beta, correlation, VaR calculations
+- **Attribution Analysis**: Performance attribution by sector, strategy, asset class
+- **Scenario Analysis**: What-if analysis for portfolio changes
+- **Benchmark Comparison**: Performance vs. standard benchmarks
+
+### Corporate Action Processing
+- **Dividend Processing**: Impact of cash and stock dividends
+- **Split Adjustments**: Handling of stock splits and reverse splits
+- **Merger & Acquisition Handling**: Position adjustments for M&A events
+- **Rights & Warrants**: Processing of corporate rights events
+- **Spin-offs**: Management of position changes from spin-off events
+
+### Portfolio Construction
+- **Rebalancing Tools**: Portfolio rebalancing against targets
+- **Optimization**: Portfolio optimization for various objectives
+- **Constraint Management**: Enforcement of portfolio constraints
+- **Tax-aware Trading**: Consideration of tax implications
+- **Cash Management**: Handling of cash positions and forecasting
+
+## Planned Integration Points
+
+### Upstream Connections
+- Order Management System (for executed trades)
+- Broker Gateway (for position verification)
+- Market Data Gateway (for pricing)
+- Strategy Orchestrator (for allocation decisions)
+
+### Downstream Consumers
+- Risk Guardian (for portfolio risk assessment)
+- Trading Dashboard (for portfolio visualization)
+- Reporting System (for performance reporting)
+- Tax Reporting (for tax calculations)
+
+## Planned Technical Implementation
+
+### Technology Stack
+- **Runtime**: Node.js with TypeScript
+- **Database**: Fast database with transaction support
+- **Calculation Engine**: Optimized financial calculation libraries
+- **API**: RESTful interface with WebSocket updates
+- **Caching**: In-memory position cache for performance
+
+### Architecture Pattern
+- Event sourcing for position history
+- CQRS for optimized read/write operations
+- Eventual consistency for distributed state
+- Snapshotting for performance optimization
+
+## Development Guidelines
+
+### Position Calculations
+- Cost basis methodologies
+- Corporate action handling
+- FX conversion approaches
+- Performance calculation standards
+
+### Data Consistency
+- Reconciliation procedures
+- Error detection and correction
+- Data validation requirements
+- Audit trail requirements
+
+### Performance Optimization
+- Caching strategies
+- Calculation optimization
+- Query patterns
+- Batch processing approaches
+
+## Implementation Roadmap
+1. Basic position tracking and P&L calculation
+2. Portfolio analytics and performance metrics
+3. Corporate action processing
+4. Advanced portfolio construction tools
+5. Tax and regulatory reporting features