Underlying Index Performance: SUSB.US tracks the Solactive United States Large Cap Select Sustainability Index. Therefore, the ETF's price closely mirrors the performance of the stocks included in that index.

Supply and Demand: General market forces play a significant role. High demand for SUSB.US, relative to supply, will drive its price upward, while increased selling pressure will push the price downward.

Expense Ratio and Trading Costs: SUSB.US has an expense ratio. This cost, along with brokerage commissions, impacts overall returns and subsequently its price relative to its underlying assets.

Net Asset Value (NAV): The NAV is the per-share value of the ETF's underlying assets. The market price of SUSB.US usually trades close to its NAV, but deviations can occur due to market inefficiencies or trading activity.

Investor Sentiment: Overall market sentiment towards sustainable investing or large-cap U.S. equities can influence the demand for SUSB.US and thus affect its price.

Changes in Index Composition: Adjustments to the Solactive United States Large Cap Select Sustainability Index, such as the addition or removal of companies, can cause temporary price fluctuations in SUSB.US as the fund adjusts its holdings to mirror the new index composition.

Economic Conditions: Macroeconomic factors such as interest rates, inflation, and GDP growth can impact the performance of the underlying companies in the index and, subsequently, SUSB.US's price.