Underlying Asset Prices: The ETF's price closely tracks the underlying assets (shares of listed companies). Changes in those share prices directly impact the ETF's value.

Supply and Demand: Market forces of supply and demand influence the ETF's price. High demand relative to supply pushes prices up, and vice versa.

Index Composition: Changes in the index the ETF tracks can affect its price if holdings are adjusted to reflect these changes.

Expense Ratio: The ETF's operating costs, known as the expense ratio, can slightly influence its overall return and thus indirectly affect its price.

Market Sentiment: Overall investor sentiment and market conditions significantly affect the ETF's trading price.

Tracking Error: The ETF's deviation from the index's returns (tracking error) impacts its attractiveness and, therefore, its price.

NAV: The Net Asset Value is a theoretical fair price, deviations may trigger arbitrage activities, impacting the ETF's market price.

Liquidity: The ETF's trading volume and the liquidity of its underlying assets can affect its price volatility.

Global Economic Events: Significant global economic events may affect the performance of the underlying assets and hence the ETF's price.