Market Interest Rates: Rising interest rates typically decrease the value of bond funds like FGDTBX.US, as newly issued bonds offer higher yields, making older, lower-yielding bonds less attractive.

Economic Conditions: A strong economy can lead to higher inflation expectations, prompting the Federal Reserve to raise interest rates, negatively impacting bond prices. Conversely, a weak economy might lead to lower rates, benefiting bond values.

Inflation Expectations: Increased inflation erodes the purchasing power of fixed income payments, causing bond yields to rise and bond prices to fall. Lower inflation expectations can boost bond prices.

Credit Risk: FGDTBX.US's value is influenced by the creditworthiness of the issuers of the bonds it holds. Downgrades in credit ratings can decrease its price, while upgrades can increase it.

Supply and Demand: Like any asset, the price of FGDTBX.US is affected by the balance of buyers and sellers. High demand pushes prices up, while increased selling pressure causes them to decline.

Fund Management: The fund manager's investment strategy and security selection skills can impact FGDTBX.US's performance relative to its benchmark, influencing investor demand and its price.