Underlying Asset Performance: The primary driver is the performance of the underlying securities tracked by the ETF, reflecting their individual price movements.

Supply and Demand: Market forces of supply and demand for the ETF shares themselves impact the price, influenced by investor sentiment and trading activity.

Interest Rates: Changes in interest rates can affect the valuation of fixed-income assets within the ETF, impacting its overall price.

Economic Conditions: Macroeconomic factors like inflation, GDP growth, and unemployment rates influence the performance of companies and sectors represented in the ETF.

Currency Fluctuations: If the ETF holds international assets, currency exchange rates can affect its price in the investor's local currency.

Expense Ratio and Management Fees: While not directly influencing daily price fluctuations, higher expense ratios can detract from long-term returns and potentially affect investor demand.

Index Reconstitution: Periodic rebalancing or changes to the underlying index can lead to trading activity and price adjustments as the ETF adjusts its holdings.