Underlying Index Performance: The ETF's price is primarily driven by the performance of the underlying index it tracks. A rise in the index will generally lead to an increase in the ETF's price, and vice versa.

Supply and Demand: Market forces of supply and demand for the ETF units also affect its price. Higher demand typically pushes the price up, while increased supply can lower it.

Net Asset Value (NAV): The NAV, representing the total value of the ETF's holdings minus liabilities, serves as a benchmark. Significant deviations between the ETF price and NAV are usually corrected by arbitrage.

Market Sentiment: Overall market sentiment, including investor confidence and risk appetite, can influence the ETF's price. Positive sentiment often leads to increased investment and higher prices.

Trading Volume: High trading volume indicates greater liquidity and price discovery, while low volume can result in wider bid-ask spreads and potentially higher volatility.

Expense Ratio: The ETF's expense ratio, the annual cost of managing the fund, indirectly affects its long-term performance and, consequently, its price relative to similar ETFs.

Changes in Underlying Assets: Composition changes or corporate actions involving the securities held within the tracked index can impact the ETF's price.

Economic Conditions: Macroeconomic factors, such as interest rates, inflation, and economic growth, can influence investor sentiment and the performance of the underlying assets, thereby impacting the ETF price.