Global Economic Conditions: Strong economic growth generally supports higher bond yields, potentially lowering SFGBFX.US NAV. Conversely, economic slowdowns may increase demand for safer assets like bonds, potentially raising its NAV.

Interest Rate Movements: Rising interest rates typically decrease bond prices, negatively impacting SFGBFX.US. Falling rates often boost bond values, positively affecting its NAV.

Inflation Expectations: Higher inflation expectations usually lead to higher bond yields, which can lower SFGBFX.US value. Lower inflation expectations can have the opposite effect.

Credit Risk Perception: Changes in the perceived creditworthiness of bond issuers within the fund's portfolio can influence its value. Downgrades may lower the fund's NAV, while upgrades might increase it.

Market Sentiment: Overall investor risk appetite affects demand for bond funds like SFGBFX.US. Increased risk aversion tends to drive investors toward bonds, potentially raising its NAV.