Expense Ratio: A higher expense ratio directly reduces the fund's net asset value, impacting its price. It's a recurring cost, eroding returns over time.

Bond Yields: As interest rates rise, the value of existing bonds in the fund decreases, lowering the fund's price. Conversely, falling rates increase bond values.

Credit Risk: Downgrades in credit ratings of bonds held by VSVNX.US can decrease their market value, leading to a lower fund price. Higher default risk also has this effect.

Inflation Expectations: Rising inflation typically leads to higher interest rates, putting downward pressure on bond prices and thus VSVNX.US.

Market Sentiment: General investor confidence in the bond market influences demand for bond funds like VSVNX.US, affecting its price. Negative sentiment can lead to outflows.

Fund Flows: Significant inflows into VSVNX.US can temporarily increase demand and potentially its price. Outflows can force the fund to sell assets, potentially decreasing the price.