Underlying Index Performance: DOG.US is designed to inversely track a specific index, typically the Dow Jones Industrial Average. If the Dow Jones goes down, DOG.US is expected to go up, and vice versa.

Expense Ratio: The ETF's management fee, known as the expense ratio, directly impacts returns. A higher expense ratio reduces the overall profit investors receive.

Supply and Demand: Like any traded asset, the price of DOG.US is influenced by supply and demand in the market. High demand can push the price up, while increased selling pressure can lower it.

Trading Volume: Higher trading volume generally means tighter bid-ask spreads and easier execution of trades, potentially making DOG.US more attractive to investors and influencing its price.

Market Sentiment: Overall investor sentiment towards the stock market, and particularly the Dow Jones, plays a role. Fear or pessimism can increase demand for inverse ETFs like DOG.US.

Index Rebalancing: The index tracked by DOG.US periodically rebalances. Changes in the index composition can lead to adjustments in the ETF's holdings, affecting its price.

Futures Contracts: Many inverse ETFs use futures contracts to achieve their inverse exposure. The pricing and roll yield of these contracts can affect the ETF's price and tracking accuracy.

Compounding Effects: Due to the daily reset nature of inverse ETFs, holding them for longer periods can lead to compounding effects that deviate from the inverse performance of the underlying index, especially in volatile markets.