Fund's Net Asset Value (NAV): TREIX.US's price is primarily driven by its NAV, reflecting the market value of its underlying assets (primarily stocks and bonds) minus liabilities, divided by outstanding shares.

Market Conditions: Broad market trends, economic indicators (e.g., interest rates, inflation), and investor sentiment significantly influence the prices of assets held by TREIX.US, impacting its NAV.

Supply and Demand: Investor demand for TREIX.US shares can cause slight deviations from the NAV, particularly if there's a large volume of buy or sell orders. This is often quickly corrected through arbitrage.

Expense Ratio: While not directly affecting daily price fluctuations, TREIX.US's expense ratio (annual fee) impacts its long-term performance and attractiveness to investors, potentially influencing demand.

Fund Management: The fund manager's investment decisions, stock picking abilities, and overall strategy directly affect the performance of the funds, influencing long-term price trends.