Assuming an arbitrage-free world, today you buy a zero-coupon bond with $100 par value and 1.5 years to maturity, and your holding period is six months. Based on the information of question 21, you can actually guess your holding period return rate without any calculation. What is your holding period return rate? Enter the result in percentage points (For example, if your guess is 10.00% or 0.1, write 10 as the answer), round your answer to 2 decimal points