Underlying Asset Performance: The primary driver is the performance of the constituent stocks within the FTSE Taiwan Dividend+ Index, which 0055.TW tracks. Higher stock prices lead to a higher ETF price.

Dividend Yield: The dividend yield of the underlying stocks affects investor demand. Higher yields can attract investors seeking income, pushing the ETF price up.

Market Sentiment: Overall market sentiment towards Taiwanese equities and the sectors represented in the index plays a role. Positive sentiment increases demand.

Supply and Demand: General supply and demand for the ETF itself influence its price. Higher demand relative to supply will increase the price.

Expense Ratio: While not a direct driver, a lower expense ratio can make the ETF more attractive compared to alternatives, indirectly affecting its price.

Currency Exchange Rates: Fluctuations in the New Taiwan Dollar (TWD) relative to other currencies can impact foreign investors' willingness to buy the ETF.

Economic Conditions: Macroeconomic factors affecting Taiwan, such as GDP growth, inflation, and interest rates, influence the overall stock market and ETF price.

Global Events: International events and geopolitical factors can impact global markets and investor sentiment towards Taiwan, indirectly affecting the ETF price.