Underlying Holdings Performance: FXN.US tracks the First Trust Materials AlphaDEX Fund. Its price is heavily influenced by the performance of the materials sector companies it holds.

Supply and Demand: Like any ETF, FXN.US's price is affected by supply and demand in the market. Higher demand pushes the price up, while increased selling pressure can lower it.

Sector Sentiment: Overall investor sentiment towards the materials sector plays a crucial role. Positive outlooks on economic growth and infrastructure development can boost demand for materials stocks.

Economic Conditions: The health of the global and U.S. economies directly impacts the materials sector. Strong economic growth often leads to increased demand for materials used in construction and manufacturing.

Interest Rates: Changes in interest rates can influence investment decisions. Higher rates may lead investors to shift away from riskier assets like materials stocks, potentially impacting FXN.US's price.