Fund Composition: VIOG tracks the CRSP US Small Cap Growth Index, so the performance of the underlying small-cap growth stocks directly influences its price.

Market Sentiment: Overall investor confidence in the stock market, especially towards growth stocks, can significantly impact VIOG's price. Positive sentiment drives demand, increasing the price, and vice-versa.

Economic Conditions: Macroeconomic factors such as interest rates, inflation, and GDP growth can affect the profitability and growth prospects of small-cap companies, indirectly impacting VIOG's value.

Sector Performance: The performance of specific sectors that are heavily represented in the index, such as technology or healthcare, will disproportionately affect VIOG's price.

Fund Flows: Large inflows of capital into VIOG can increase demand and push the price higher, while outflows can have the opposite effect.

Expense Ratio: The expense ratio, although relatively small, represents the cost of managing the fund, which slightly reduces the overall return and potentially the fund's price relative to its benchmark.