Market Interest Rates: Rising interest rates generally decrease bond prices, as newly issued bonds offer higher yields, making older bonds less attractive. Conversely, falling rates tend to increase bond prices.

Credit Quality: Downgrades in the credit ratings of bonds held by the fund can lead to price declines. Conversely, upgrades can boost prices. TLDIX's focus on investment-grade bonds aims to mitigate this risk.

Inflation Expectations: Rising inflation expectations erode the real value of fixed-income investments, leading to lower bond prices. Conversely, lower inflation expectations can boost prices.

Economic Growth: Strong economic growth can sometimes lead to higher interest rates and inflation, potentially decreasing bond prices. Slower growth can have the opposite effect.

Fund Management: The fund manager's investment decisions, including security selection and duration management, can impact the fund's performance and price.

Supply and Demand: General supply and demand for bond funds can influence the price of TLDIX. Increased demand can drive up prices, while increased supply can push them down.

Duration: TLDIX's duration, a measure of its sensitivity to interest rate changes, is a key factor. Funds with longer durations are more sensitive to interest rate fluctuations.

Geopolitical Events: Major geopolitical events can create uncertainty and volatility in financial markets, impacting bond prices.

Liquidity: The ease with which the fund's holdings can be bought and sold affects its price. Less liquid holdings can lead to wider bid-ask spreads and potential price fluctuations.