Nevertheless, even after a trader diversifies his portfolio, some risk will remain. Because some risk is associated with the market as a whole, this risk cannot be neutralized through diversification. In other words, no matter how hard a trader tries to avoid risk, some risk will remain. This is the systemic risk. The Beta measures the risk associated with one particular asset in relation to the overall market.
Futures trading requires margin payments.
Remember that margin payments are not investments. Margin payments are good faith deposits. Therefore, with a Beta of zero, the return should be zero. A Beta above zero should bring a positive return to a long position. And a Beta below zero should bring a negative return on a long position.