Some common services provided by portfolio development companies include:

1. Investment analysis and selection: Portfolio development services may provide expert analysis and advice on the best investment options based on the client's objectives, risk tolerance, and time horizon.

2. Portfolio diversification: These services may help clients to build a diversified portfolio of investments, spreading risk across a range of asset classes and investment types.

3. Risk management: Portfolio development services can also help clients manage risk by monitoring and adjusting their investments to protect against market volatility.

4. Performance monitoring and reporting: A key component of portfolio development services is tracking investment performance and providing regular reports to clients, keeping them informed about the progress of their investments.

5. Tax planning: Portfolio development services may provide tax planning advice, helping clients to minimize their tax liability and maximize their after-tax returns.

Overall, portfolio development services can be a valuable resource for individuals and organizations looking to build and manage a successful investment portfolio.