Underlying Asset Performance: The primary driver is the performance of the assets (e.g., stocks, bonds) the ETF tracks. A rise in the underlying assets' value typically increases the ETF's price, and vice versa.

Supply and Demand: Like any security, the ETF's price fluctuates based on the balance between buying and selling pressure in the market. High demand can push the price above its net asset value (NAV).

Interest Rates: Changes in interest rates, especially if the ETF holds bonds, can significantly impact its price. Generally, rising interest rates can decrease bond values and, consequently, the ETF's price.

Economic Conditions: Broad economic factors like inflation, GDP growth, and unemployment rates influence investor sentiment and the performance of the underlying assets, thus affecting the ETF's price.

Currency Fluctuations: For ETFs holding assets denominated in other currencies, exchange rate movements can impact the ETF's price when translated back to the base currency (e.g., Euro for XETRA-listed ETFs).