Market Interest Rates: Rising rates can decrease bond values, impacting FBOKX's price as it holds bonds. Lower rates can increase bond values.

Credit Quality of Holdings: Downgrades to the credit ratings of bonds held by FBOKX will negatively affect the fund's net asset value (NAV) and therefore its price.

Inflation Expectations: Higher inflation expectations typically lead to higher bond yields (and lower bond prices), negatively affecting FBOKX's NAV. Lower inflation expectations have the opposite effect.

Fund Management Performance: How well the fund's managers select and manage the bonds within the fund affects overall returns and therefore the fund's price.

Economic Growth: Strong economic growth can lead to expectations of higher interest rates, negatively affecting bond prices and FBOKX's price. Slow or negative growth can have the opposite effect.

Supply and Demand for FBOKX: If more investors want to buy FBOKX than sell it, its price may increase. Conversely, if more investors want to sell it than buy it, its price may decrease.