An investor just sold an investment that she had owned for 27 years. The investor eamed a holding period retum of 838.31%. What was the effective annual rate (annualized rate of return) earned by the investor over the 27 -year investment period? Enter your answer in decimal form out to four decimals. For example, a return of 10.15% would be entered as 0.1015 . An investor just sold an investment that she had owned for 27 years. The investor eamed a holding period retum of 838.31%. What was the effective annual rate (annualized rate of return) earned by the investor over the 27 -year investment period? Enter your answer in decimal form out to four decimals. For example, a return of 10.15% would be entered as 0.1015