So, can someone explain rationally how options/derivatives are actually useful to the economy, rather than a market manipulation and gambling mechanism? In the traditional, elementary school understanding of stock, people buy into a company because they want part ownership, and the stock goes up as the company does well and has solid financial strength. Derivatives seem to be an unnecessary accelerator.
You decide you can accept X% risk. You estimate portfolio risk is Y%.
You can enter options positions for the portfolio components to force Y to X.