Underlying Assets' Performance: 00690.TW tracks a specific index. The price fluctuations of the underlying assets within that index directly impact the ETF's price.

Supply and Demand: Like any traded asset, the balance between buyers and sellers of 00690.TW influences its market price. Higher demand typically pushes the price up, while increased selling pressure can drive it down.

Index Rebalancing: Periodic rebalancing of the tracked index can affect 00690.TW's holdings. Changes in the index composition may trigger buying or selling activity, impacting the ETF's price.

Market Sentiment: Overall investor confidence or fear in the market can influence the demand for 00690.TW. Positive sentiment can lead to increased investment, while negative sentiment may result in sell-offs.

Expense Ratio: The ETF's expense ratio, the annual cost of managing the fund, indirectly affects its price by reducing the overall return to investors, thus affecting demand.

Currency Fluctuations: If the underlying assets are denominated in a different currency than the trading currency of 00690.TW, exchange rate movements can impact the ETF's price.

Economic Conditions: Macroeconomic factors like interest rates, inflation, and economic growth can impact the performance of the underlying assets and, consequently, the price of 00690.TW.