Underlying Asset Performance: 00850.TW tracks an index. The prices of the securities in that index directly impact the ETF's price.

Supply and Demand: High demand for the ETF pushes the price up, while increased selling pressure can lower it.

Management Fees & Expenses: While not directly changing the market price, higher fees reduce overall returns, indirectly affecting demand.

Market Sentiment: Overall investor optimism or pessimism regarding the market sector the ETF tracks influences its price.

Currency Fluctuations: If the ETF holds assets denominated in other currencies, exchange rate changes can impact its value.

Economic Conditions: Broad economic factors such as interest rates, inflation, and GDP growth can affect investor sentiment and asset prices.

Tracking Error: How closely the ETF mirrors its underlying index affects investor confidence and thus its price.

Arbitrage: Market makers and authorized participants help to keep the ETF price aligned with its net asset value (NAV) through arbitrage opportunities.