Tango, Corp. expects to have an earnings per share of $4. The company will be paying out 50% of that earnings to its shareholders, with the rest retained in the company for future growth at rate of 20% each year. The share price of the company's stock is currently at $20. What rate of return do Tangos investors require if its stock's intrinsic value has been reflected in the market price? (Do not round intermediate calculations.)

Rate of Return = ?