Creditworthiness of Issuers: SSAIX primarily invests in investment-grade debt. Deterioration in the credit ratings of the underlying issuers within the portfolio increases the perceived risk and potentially lowers the fund's NAV.

Interest Rate Fluctuations: As a bond fund, SSAIX's value is inversely related to interest rate changes. Rising interest rates typically cause bond prices to decline, lowering the fund's NAV. Conversely, falling rates usually increase the fund's value.

Economic Conditions: Overall economic health, including inflation, GDP growth, and unemployment rates, influences interest rates and credit spreads, indirectly impacting the fund's performance.

Market Sentiment: Investor confidence and risk appetite can affect demand for bond funds like SSAIX. Negative sentiment may lead to increased selling pressure, potentially driving down the price.

Fund Flows: Significant inflows or outflows of capital into or out of SSAIX can influence its NAV, particularly if the fund manager needs to rapidly buy or sell holdings to accommodate these flows.

Inflation Expectations: Rising inflation expectations can push bond yields higher, which subsequently reduces bond prices and lowers the fund's value.

Maturity & Duration: SSAIX's weighted average maturity and duration indicate its sensitivity to interest rate changes. Longer durations mean greater price volatility in response to rate movements.