Why wouldn't investors invest all of their money in software companies instead of in less profitable companies? (Focus on risk and return.)

Answer and Explanation:

Risk and return are equal companions if we invest in a market with a higher risk that's mean this type of market provides a higher return.

If Investors invest their whole money in the high-risk market for there high return, may they get a huge loss.

So, The exposure must be balanced by investments in diversified markets with different risk weights.