Market Interest Rates: Rising interest rates often make bonds less attractive, decreasing their price. Conversely, falling rates tend to boost bond prices.

Credit Quality: The financial health of the issuers backing the bonds in the fund significantly impacts its price. Downgrades typically lead to price declines.

Inflation Expectations: Higher inflation erodes the real value of future bond payments, often leading to lower bond prices as investors demand higher yields.

Economic Growth: A strong economy can lead to higher interest rates and inflation, potentially pushing bond prices lower. A weaker economy may do the reverse.

Fund Management: The skill of the fund manager in selecting and managing bonds directly affects the fund's performance and, thus, its price.

Investor Sentiment: General optimism or pessimism in the market can drive buying or selling pressure, influencing the fund's price, regardless of underlying factors.

Supply and Demand: Increased demand for JVTIX.US can drive its price higher, while increased selling pressure can cause it to fall.

Maturity and Duration: Longer-maturity bonds are generally more sensitive to interest rate changes, so a fund with longer average maturities may see more price volatility.

Call Provisions: Bonds that can be called (redeemed) by the issuer before maturity may become less attractive if interest rates fall, limiting potential price gains.

Liquidity: If JVTIX.US is not very liquid, larger trades can have a disproportionate impact on its price, leading to increased volatility.