GET /api/v1/portfolios/{portfolio_id}
Authorization: Bearer {access_token}

{
  "portfolio_id": "port_abc123",
  "customer_id": "cust_xyz789",
  "total_value": 150000.00,
  "currency": "EUR",
  "positions": [
    {
      "asset_type": "EQUITY",
      "symbol": "AAPL",
      "quantity": 100,
      "current_value": 17500.00,
      "unrealized_pnl": 2500.00
    },
    {
      "asset_type": "FIXED_INCOME",
      "symbol": "BOND_EU_10Y",
      "quantity": 50,
      "current_value": 52500.00,
      "unrealized_pnl": -500.00
    }
  ],
  "performance": {
    "ytd_return": 8.5,
    "total_return": 15.2
  }
}

GET /api/v1/portfolios/{portfolio_id}/risk
Authorization: Bearer {access_token}

{
  "portfolio_id": "port_abc123",
  "risk_metrics": {
    "var_95": 5200.00,
    "volatility": 12.5,
    "sharpe_ratio": 1.2,
    "beta": 0.85
  },
  "concentration_risk": {
    "top_holding_pct": 35.0,
    "sector_concentration": "MODERATE"
  }
}

POST /api/v1/portfolios/{portfolio_id}/orders
Content-Type: application/json
Authorization: Bearer {access_token}

{
  "asset_type": "EQUITY",
  "symbol": "MSFT",
  "side": "BUY",
  "quantity": 25,
  "order_type": "MARKET"
}