On the capital market line, assume that the investor can borrowmoney at the risk-free rate and invest the money in the risky portfolio. The portfolios with a rate of return higher than the return on market portfolio, but with higher risks, along the line contains a negative amount of the risk-free asset and is called borrowing portfolios. The negative amount invested in the risk-free asset can be viewed as borrowing funds at the risk-free rate and investing in risky assets.