Underlying Asset Performance: The price of 00651R.TW, an ETF tracking a specific index or basket of assets, is primarily driven by the performance of its underlying holdings. If the value of the stocks or bonds held by the ETF increases, the ETF's price will generally rise, and vice versa.

Supply and Demand: Basic economic principles of supply and demand also influence the ETF's price. Higher demand relative to supply will push the price up, while greater supply compared to demand will cause the price to fall. Market sentiment and investor appetite play a significant role here.

Expense Ratio and Trading Costs: The ETF's expense ratio, which represents the annual fee charged by the fund manager, can indirectly impact its price. Higher expenses may lead to slightly lower returns over time. Similarly, trading costs associated with buying and selling ETF shares can affect the overall return for investors.

Market Sentiment and Economic Conditions: Broad market sentiment and overall economic conditions, such as interest rates, inflation, and economic growth, can affect investor confidence and, consequently, the demand for and price of the ETF. Negative news or economic downturns may lead to decreased investment and lower prices.