Market Interest Rates: Rising rates typically decrease bond prices as newer bonds offer higher yields, making older, lower-yielding bonds like those in TFBVX less attractive.

Credit Risk: Increased concerns about the ability of issuers to repay debts lower the fund's value, reflecting higher perceived risk.

Inflation Expectations: Higher inflation expectations often lead to lower bond prices because investors demand higher yields to compensate for the reduced purchasing power of future payments.

Economic Growth: Strong economic growth can lead to higher interest rates and inflation, negatively impacting bond prices, while weaker growth may support them.

Fund Management: The skill of the fund manager in selecting and trading bonds impacts returns. Ineffective management may result in underperformance compared to benchmarks.

Liquidity: Lower liquidity in the bond market can increase price volatility, affecting the fund's net asset value.

Fund Flows: Large outflows may force the fund to sell assets, potentially driving down prices, while inflows can support prices.