Market Interest Rates: Rising interest rates typically cause bond prices, and thus FRVAX's NAV, to fall.

Credit Quality of Holdings: Downgrades in the creditworthiness of bonds held by the fund can negatively impact its value.

Economic Growth: Strong economic growth can lead to inflationary pressures, potentially decreasing bond values.

Inflation Expectations: Higher inflation expectations usually push bond yields up and prices down, affecting FRVAX.

Fund Manager Strategy: Decisions made by the fund manager regarding asset allocation and security selection influence performance.

Fund Flows: Significant redemptions from the fund may force asset sales, potentially lowering its NAV.

Maturity of Holdings: Longer-term bonds in the portfolio are generally more sensitive to interest rate changes.

Call Risk: Bonds subject to being called before maturity can limit potential price appreciation and affect yield.