You have just purchased an Australian Treasury Bill, which is a zero-coupon bond security with a positive yield to maturity. The yield to maturity has increased by 0.5% immediately after your purchase. In which direction should the price have moved?

NOTE: a zero-coupon bond is one that only pays a single payment (i.e., the principal amount) at maturity. No coupons are paid.

a) None of the other answers

b) Downwards

c) Price will remain unchanged

d) Upwards

e) Cannot determine from available information