Net Asset Value (NAV): The primary driver; TRZVX.US's price directly reflects its NAV, calculated daily based on underlying asset values.

Market Sentiment: Overall market optimism or pessimism can influence demand, pushing the price slightly above or below NAV, particularly during volatile periods.

Fund Flows: Large inflows or outflows can temporarily impact price if the fund needs to rapidly buy or sell assets, affecting market prices.

Expense Ratio: While not directly changing the daily price, a higher expense ratio gradually reduces returns, impacting long-term NAV growth.

Underlying Bond Yields: As TRZVX.US holds bonds, changes in prevailing interest rates and bond yields affect the value of its bond holdings and thus its NAV.

Credit Quality: Perceived changes in the creditworthiness of the bonds held within TRZVX.US influence the fund's valuation.

Inflation Expectations: Inflation expectations influence interest rates, which then affect bond yields and the fund's NAV.

Economic Conditions: Economic growth or recession can influence corporate bond performance, impacting the fund's holdings.

Fund Manager Decisions: Investment choices made by the fund manager in selecting bonds influence performance and therefore NAV.

Geopolitical Events: Major global events can create market uncertainty and impact bond values.