Market Interest Rates: Rising interest rates typically decrease bond prices as newer bonds offer higher yields, making older bonds less attractive.

Inflation Expectations: Higher inflation erodes the purchasing power of future fixed income payments, leading to lower bond prices. Conversely, lower inflation expectations tend to raise bond prices.

Credit Quality of Issuers: Deteriorating creditworthiness of the bond issuers may increase the risk of default, lowering the prices of those bonds. Rating upgrades usually increase bond prices.

Economic Growth: Strong economic growth might lead to higher interest rates and inflation, both of which negatively affect bond prices. Slower growth could lower interest rates, increasing bond values.

Supply and Demand: An oversupply of bonds relative to demand will likely decrease prices. Conversely, high demand relative to supply will tend to increase prices.

Geopolitical Risk: Increased global uncertainty can drive investors towards safer assets like government bonds, potentially increasing bond prices.