Answer: Fall in Benchmark Interest Rates.
Explanation:
This activity was caused by a Refinancing Drive. Refinancing is when entities get a new loan with a lower interest rate and pay off the older loan with a higher interest rate so that they can pay at the lower rate.
Bond interest rates are usually fixed so when interest rates in a country fall, bond holders don't benefit from that. One option they have to take advantage of that is to go on a Refinancing Drive and issue new bonds at those lower rates and then pay off the older ones.
That is what Apple, Deere, and Walt Disney have done.
