**Net Asset Value (NAV):** The fund's NAV, calculated daily, is a primary driver. It reflects the market value of the fund's underlying assets (stocks, bonds, etc.) minus liabilities, divided by the number of outstanding shares.

**Market Sentiment:** General investor confidence or fear can impact demand for the fund, influencing its price above or below NAV, particularly in actively traded funds.

**Underlying Asset Performance:** The performance of the securities held within the fund directly affects its NAV and therefore its price. Positive returns in those assets lead to price increases, and vice versa.

**Fund Flows:** Large inflows of investments can increase demand, potentially pushing the price up, while significant outflows can create downward pressure.

**Expense Ratio:** The fund's annual operating expenses, including management fees, can slightly reduce returns and indirectly impact the price over time.

**Interest Rates:** Changes in interest rates, especially for bond funds or funds holding interest-rate-sensitive assets, can influence the fund's price.

**Economic Conditions:** Macroeconomic factors like inflation, GDP growth, and unemployment rates can impact the overall market and specific sectors, influencing the performance of the fund's holdings.