sample-data/companies.json

```json
[
    {"symbol": "OGDC", "name": "Oil & Gas Development Company", "sector": "Oil & Gas", "current_price": 86.45, "change_percent": 1.25, "volume": 12500000},
    {"symbol": "LUCK", "name": "Lucky Cement", "sector": "Cement", "current_price": 650.20, "change_percent": -2.35, "volume": 850000},
    {"symbol": "HBL", "name": "Habib Bank Limited", "sector": "Banking", "current_price": 125.75, "change_percent": 0.85, "volume": 4500000},
    {"symbol": "ENGRO", "name": "Engro Corporation", "sector": "Chemical", "current_price": 320.50, "change_percent": 3.15, "volume": 2200000},
    {"symbol": "PPL", "name": "Pakistan Petroleum", "sector": "Oil & Gas", "current_price": 92.80, "change_percent": 0.75, "volume": 9800000},
    {"symbol": "UBL", "name": "United Bank Limited", "sector": "Banking", "current_price": 118.40, "change_percent": -0.65, "volume": 3800000},
    {"symbol": "FFC", "name": "Fauji Fertilizer Company", "sector": "Chemical", "current_price": 135.60, "change_percent": 1.45, "volume": 3100000},
    {"symbol": "MCB", "name": "MCB Bank Limited", "sector": "Banking", "current_price": 185.25, "change_percent": 0.35, "volume": 2900000},
    {"symbol": "EFERT", "name": "Engro Fertilizers", "sector": "Chemical", "current_price": 78.90, "change_percent": 2.10, "volume": 4100000},
    {"symbol": "POL", "name": "Pakistan Oilfields", "sector": "Oil & Gas", "current_price": 420.75, "change_percent": -1.25, "volume": 1500000}
]
```