**Underlying Index Performance**: QIG tracks the WisdomTree International Quality Dividend Growth Index. This index's performance heavily influences the ETF's price. If the index rises, QIG typically rises, and vice versa. **Holdings' Dividend Payouts**: QIG focuses on dividend-paying companies. Changes in the dividends paid by its underlying holdings directly impact the ETF's value and attractiveness to investors. **Investor Demand**: Higher demand for QIG shares drives the price up. Conversely, increased selling pressure causes the price to fall. This is driven by overall market sentiment and interest rates. **Interest Rate Changes**: Rising interest rates can make dividend-paying stocks, including those in QIG, less attractive compared to bonds. This decreased demand leads to lower prices. **Currency Fluctuations**: As QIG invests in international companies, currency fluctuations between the US dollar and the currencies of those companies can impact the ETF's value. A stronger US dollar reduces the value. **Economic Conditions**: Economic growth or slowdowns in the countries where QIG invests affect the performance of the underlying companies, ultimately influencing the ETF's price. **Management Fees and Expenses**: While a small factor, the ETF's management fees and operating expenses subtly reduce its return compared to the underlying index's raw performance.