from typing import List  
from pydantic import BaseModel, Field  
class Company(BaseModel):  
  name: str  
  ticker: str  
  latest_price: float = Field(description="The latest price of the stock.")  
…  
class StockReport(BaseModel):  
  company: Company  
  company_overview: CompanyOverview  
  key_financial_data: KeyFinancialData  
  buy_case: List[BulletPoint]  
  sell_case: List[BulletPoint]