Which of the following is NOT a factor that shifts bond supply?

The factor that does not contribute to shifting the supply of bonds is changes in household wealth. The supply of bonds is primarily influenced by the behavior of issuers, such as corporations and governments, rather than the conditions affecting individual household wealth.

When the government decides to borrow more, it directly increases the supply of bonds as it issues more debt to finance its spending. Similarly, changes in business conditions can lead to corporations either expanding or contracting their operations, which may lead to an increase or decrease in the bonds they issue to support their activities.

On the other hand, household wealth reflects individual financial situations and affects the demand side of the bond market, influencing how much individuals are willing to purchase rather than impacting how many bonds are available in the market overall. Thus, changes in household wealth do not shift the bond supply curve, making this the correct answer.