FSYDX.US, or Fidelity Sustainable U.S. Equity ETF, is influenced by a variety of factors affecting its net asset value (NAV). Market Conditions: Overall stock market performance, economic growth, and investor sentiment significantly impact the ETF's holdings and therefore its price. Underlying Holdings' Performance: The price fluctuates based on the performance of the individual companies within the ETF's portfolio, particularly those with larger weightings. Sector Performance: The sectors in which the ETF invests, such as technology, healthcare, or consumer discretionary, can drive performance depending on prevailing economic and market trends. Interest Rates: Changes in interest rates influence the valuation of companies within the ETF, affecting the overall NAV. Fund Flows: Large inflows or outflows of capital into or out of the ETF can create buying or selling pressure, thus impacting its price. Sustainability Factors: Investor demand for sustainable investments and the performance of companies meeting ESG criteria will influence demand and the ETF's price.