Here are the factors that influence the price of SPDN.US ETFs. Underlying Index Performance: SPDN's price mirrors the inverse performance of the S&P 500. A decline in the S&P 500 generally causes SPDN's price to increase.

Market Sentiment: Negative market sentiment, like fear of a recession, can drive investors to SPDN as a hedge, increasing demand and price.

Interest Rates: Higher interest rates can sometimes negatively impact stock market performance, potentially leading to increased demand for inverse ETFs like SPDN.

Trading Volume and Liquidity: Higher trading volume and liquidity can lead to tighter bid-ask spreads and more efficient price discovery for SPDN.

Expense Ratio: SPDN's expense ratio will slightly detract from its overall performance, relative to the inverse of the S&P 500.

Supply and Demand: Basic supply and demand forces influence the price. High demand relative to supply increases the price, and vice versa.

Economic Data: Weak economic data (e.g., poor jobs reports) can negatively impact the S&P 500 and thus positively impact SPDN.

Volatility: Increased market volatility tends to benefit inverse ETFs in the short term, leading to increased demand and a higher SPDN price when S&P 500 declines.