Underlying Index Performance: REW aims to deliver 2x the *inverse* daily performance of the Dow Jones U.S. Real Estate Index. Therefore, when the real estate index declines, REW's price *should* increase, and vice versa.

Leverage Decay: As a leveraged ETF, REW experiences leverage decay. This means that over longer periods, its performance can deviate significantly from 2x the inverse daily returns of the real estate index, especially in volatile markets.

Interest Rates & Financing Costs: REW uses derivatives (like swaps) to achieve its leveraged exposure. The cost of these derivatives is affected by interest rates. Higher rates can increase financing costs, negatively impacting REW's returns.

Market Sentiment toward Real Estate: Broad investor confidence or pessimism in the real estate sector, driven by economic factors like inflation, interest rates, and housing market trends, indirectly impacts the underlying index and subsequently REW.

Supply and Demand for REW Shares: While primarily influenced by the index, imbalances in buyer/seller activity specifically for REW shares can cause temporary price deviations, particularly during periods of high trading volume.