Underlying Index Performance: WEIX.US tracks the Solactive China Technology Innovators Index. Therefore, the ETF's price is significantly affected by the performance of the companies within that index.

Supply and Demand: Like any security traded on an exchange, the price of WEIX.US is influenced by the forces of supply and demand. Higher demand tends to push the price up, while increased selling pressure can drive it down.

Expense Ratio: The ETF's expense ratio, while not directly impacting the daily price, will affect its long-term performance relative to its underlying index. Higher expense ratios can lead to slightly lower returns over time.

Currency Fluctuations: Because the underlying index contains Chinese companies, fluctuations in the exchange rate between the U.S. dollar and the Chinese yuan (CNY) can impact the ETF's price when measured in USD.

Market Sentiment: Overall market sentiment towards Chinese technology stocks and the Chinese economy can also play a role. Positive sentiment can attract more investors, increasing demand, and vice versa.

Regulatory Changes: Changes in regulations affecting the technology sector in China, or regulations impacting foreign investment in Chinese companies, can significantly influence investor confidence and thus the ETF's price.