Underlying Asset Performance: The primary driver is the performance of the underlying securities tracked by the ETF. Positive performance increases ETF price, and negative performance decreases it.

Supply and Demand: Market supply and demand for the ETF itself affects its price. Higher demand pushes the price up, while increased supply pushes it down.

Net Asset Value (NAV): The NAV, reflecting the value of the ETF's holdings, acts as a benchmark for its market price. Deviations from NAV can create arbitrage opportunities.

Expense Ratio: Although indirect, a higher expense ratio can slightly lower the relative return compared to similar ETFs, potentially impacting its attractiveness and price.

Market Sentiment: Overall market optimism or pessimism affects investor appetite for the assets represented by the ETF, influencing demand and price.

Trading Volume and Liquidity: High trading volume and liquidity usually result in tighter bid-ask spreads and more efficient price discovery, while low liquidity may cause price volatility.

Economic Indicators: Macroeconomic factors like interest rates, inflation, and GDP growth influence investor sentiment and corporate earnings, affecting the prices of the underlying assets.

Currency Exchange Rates: For ETFs investing in international assets, currency fluctuations between the ETF's currency and the underlying assets' currencies affect the ETF's price.

Index Changes: Changes in the index the ETF tracks, such as additions or deletions of constituents, can lead to price adjustments.

Political and Regulatory Events: Major political or regulatory changes can influence investor confidence and market conditions, impacting the prices of assets in the ETF.

Competition: Performance relative to similar ETFs.