NAV Fluctuations: 00739.TW's price closely tracks its Net Asset Value (NAV), which reflects the underlying assets' market value. Changes in the holdings' prices directly affect the ETF's value.

Supply and Demand: Higher demand pushes the price up, while increased supply can lower it. This interplay is influenced by investor sentiment and market trends.

Tracking Error: The ETF aims to replicate the index's performance. Deviations, known as tracking error, can cause its price to diverge slightly from the expected value based on the index.

Management Fees: Expenses associated with managing the ETF are indirectly reflected in its price, as they impact the NAV and ultimately the ETF's market value.

Market Sentiment: Overall market optimism or pessimism significantly impacts investor activity in the ETF, driving price fluctuations accordingly.

Interest Rate Changes: Interest rate hikes can make bond ETFs less appealing compared to other investments and affect demand.

Economic Indicators: Key economic releases, like inflation or employment data, can influence investor decisions and trigger price movements.