ELI5: Explain Like I'm 5

Treasury security

A treasury security is like a special kind of sticker that the government sells to people who want to lend the government money. When you buy a treasury security (sticker), you are basically loaning the government some of your money. Then, over time, the government pays you back your money plus a little bit extra as a thank you for loaning them the money. The government uses this money to pay for things like building new schools, fixing roads, and helping people who need it. So, when you buy a treasury security, you are doing something good for the government and helping them do important things for the country.