Underlying Asset Performance: The ETF's price mirrors the performance of its underlying securities. Positive performance of the holdings pushes the ETF price up, conversely negative performance leads to a price decline. Supply and Demand: Market demand for the ETF and the availability of its shares directly impact price. Higher demand relative to supply increases the price; increased supply relative to demand lowers it. Market Sentiment: Broad investor sentiment towards the specific sector or asset class the ETF tracks influences its price. Optimistic sentiment increases demand, pushing the price up, while pessimistic sentiment can lead to selling pressure and price decreases. Expense Ratio & Trading Costs: The ETF's expense ratio, which covers management fees and operational costs, indirectly affects its price by reducing returns. Brokerage fees and trading spreads also impact the overall cost of investing, influencing investor willingness to buy or sell, thereby affecting the ETF's price.