Purchasing bonds (increasing demand demand) makes bond yield lower. Lower the yield - less government has to pay for debt servcie[1]. [1]: https://www.investop

Purchasing bonds (increasing demand demand) makes bond yield lower. Lower the yield - less government has to pay for debt servcie[1]. [1]: https://www.investopedia.com/terms/d/debtservice.asp https://www.investopedia.com/terms/d/debtservice.asp