Underlying Index Performance: The ETF's price closely tracks the performance of its underlying index. If the index constituents rise, the ETF price usually increases, and vice versa.

Supply and Demand: Like any security, supply and demand influence 1STS.XETRA's price. Higher demand pushes the price up, while increased supply leads to a price decrease.

Market Sentiment: Overall market sentiment, whether bullish or bearish, can impact the ETF's price. Positive market conditions tend to lift the price, while negative sentiment can depress it.

Currency Fluctuations: As a European ETF, currency exchange rates between the Euro and other currencies can affect its price, especially for investors outside the Eurozone.

Expense Ratio and Trading Costs: The ETF's expense ratio and any brokerage fees will affect its overall return and relative attractiveness to investors, indirectly impacting price.

Fund Flows: Large inflows or outflows of money into or out of the ETF can impact its share price, especially if the ETF has difficulty managing these flows efficiently.