Underlying Index Performance: 00643.TW tracks the Taiwan 50 Index. Its price closely mirrors the performance of those 50 largest Taiwanese companies.

Supply and Demand: Like any exchange-traded asset, market supply and demand dynamics influence the ETF's price. Higher demand generally pushes the price up, while increased supply can lower it.

Net Asset Value (NAV): The NAV reflects the total value of the ETF's underlying holdings. Discrepancies between the ETF price and its NAV can create arbitrage opportunities, eventually aligning the price closer to the NAV.

Economic Conditions: Overall economic health in Taiwan and globally impacts the stock market and therefore the Taiwan 50 Index, indirectly affecting the ETF's price.

Investor Sentiment: General investor optimism or pessimism towards the Taiwanese stock market and the technology sector (which has a significant weighting in the index) can impact demand for the ETF.

Currency Fluctuations: Changes in the value of the New Taiwan Dollar (TWD) relative to other currencies, particularly the US dollar, can influence the ETF's price, especially for foreign investors.

Dividend Yield: Dividend payouts from the underlying companies in the Taiwan 50 Index contribute to the ETF's overall return and can influence its attractiveness to investors.

Interest Rates: Interest rate changes in Taiwan can impact company valuations and overall market sentiment, indirectly affecting the ETF's price.

Political and Geopolitical Events: Major political or geopolitical events, both domestically and internationally, can create market uncertainty and influence investor decisions, affecting the ETF's price.