Underlying Asset Performance: The primary driver is the performance of the underlying assets the ETF tracks. If those assets rise, the ETF price typically follows suit.

Supply and Demand: Like any asset, supply and demand forces in the market affect UFMB.XETRA's price. Higher demand usually increases the price; increased supply tends to decrease it.

Market Sentiment: Overall investor confidence or pessimism can influence ETF prices, leading to buying or selling pressure regardless of the underlying asset's individual performance.

Index Tracking: The ETF aims to mirror the performance of a specific index. Deviations from this tracking, known as tracking error, can impact the ETF's price relative to the index.

Expense Ratio: While not a direct price determinant, the ETF's expense ratio affects its overall return and attractiveness to investors, which can indirectly influence demand and price.

Currency Fluctuations: For ETFs holding assets in different currencies, exchange rate changes can impact the ETF's value when converted back to the base currency (e.g., Euro).