[Market Interest Rates]: Rising interest rates generally decrease bond values, potentially lowering VFFVX's price, while falling rates can increase it.

[Inflation Expectations]: Higher inflation expectations can erode bond values, negatively impacting VFFVX, as investors demand higher yields to compensate for inflation risk.

[Credit Risk]: Downgrades or concerns about the creditworthiness of issuers within VFFVX can lower its price, reflecting increased default risk.

[Economic Growth]: Strong economic growth might lead to higher interest rates and inflation, potentially decreasing bond values in VFFVX. Slower growth could have the opposite effect.

[Supply and Demand]: Investor demand for VFFVX directly impacts its price. Increased demand raises the price; decreased demand lowers it.

[Maturity of Holdings]: The weighted average maturity of the bonds held in VFFVX influences its sensitivity to interest rate changes. Longer maturities have higher sensitivity.

[Fund Management Decisions]: The fund manager's buying and selling decisions within VFFVX, based on market conditions and investment strategy, impact its performance and price.

[Expense Ratio]: Although not directly impacting the price, VFFVX's expense ratio affects its net return, influencing its attractiveness to investors.