Total Market Performance: VTHR.US tracks the performance of the FTSE All-World ex US index. A general rise in global stock markets, excluding the US, will likely increase VTHR's price.

Currency Fluctuations: As VTHR holds international stocks, currency exchange rates significantly impact returns. A stronger US dollar reduces the value of foreign holdings when translated back into USD.

Sector Performance: The ETF's performance is affected by the performance of the sectors it holds, such as financials, technology, and consumer discretionary, in ex-US markets.

Interest Rates: Changes in interest rates by central banks outside the US can impact stock valuations and economic growth prospects, which in turn affects the ETF's price.

Economic Growth: Economic growth or contraction in the countries included in the index directly influences the performance of companies and the overall value of the ETF.

Investor Sentiment: Broad investor sentiment towards international equities can drive demand for VTHR.US, influencing its market price independent of fundamental value.

Fund Flows: Large inflows or outflows from the ETF can cause temporary price discrepancies as the fund manager buys or sells underlying assets to match the ETF's exposure.

Political and Geopolitical Risks: Political instability, trade wars, or other geopolitical events in regions where the fund invests can negatively impact market sentiment and the ETF's price.