Underlying Assets Performance: The primary driver is the performance of the underlying securities tracked by the ETF. If the assets in the index rise, the ETF price tends to increase, and vice versa.

Supply and Demand: Market forces of supply and demand influence the ETF's price. Higher demand pushes the price up, while increased supply can lower it.

Net Asset Value (NAV): The NAV, representing the per-share value of the ETF's holdings, serves as a benchmark. Discrepancies between the market price and NAV create arbitrage opportunities.

Market Sentiment: Overall investor sentiment towards the sectors or asset classes the ETF tracks can impact its price, regardless of the underlying assets' intrinsic value.

Expense Ratio: The ETF's expense ratio, which covers management and operational costs, can slightly affect its long-term performance and investor appeal.

Trading Volume & Liquidity: Higher trading volume and liquidity typically lead to tighter bid-ask spreads and potentially better price execution for investors.

Macroeconomic Factors: Broad economic conditions such as interest rates, inflation, and economic growth can indirectly affect the underlying assets and, consequently, the ETF's price.