Market Supply and Demand: Higher demand relative to supply increases the price, while increased supply compared to demand lowers it.

Underlying Asset Performance: The ETF's price is heavily influenced by the performance of the assets (e.g., stocks, bonds) held within its portfolio.

Index Tracking Accuracy: How closely the ETF tracks its benchmark index affects its price, with discrepancies creating tracking error.

Management Fees and Expenses: Higher fees can negatively impact returns and therefore, the ETF's attractiveness and price.

Interest Rates: Changes in interest rates, especially for bond ETFs, can affect the ETF's price due to their impact on bond yields.

Currency Fluctuations: For ETFs investing in international assets, currency exchange rate fluctuations can impact the ETF's price when converted to the local currency.

Investor Sentiment: General market sentiment (bullish or bearish) can significantly influence investor demand and thus the ETF's price.