Equity Market Performance: Overall stock market trends influence VIGIX's price, as it's invested in a broad range of US stocks.

Economic Conditions: Macroeconomic factors like GDP growth, inflation, and interest rates impact the earnings and valuations of companies held in VIGIX, thus affecting its price.

Investor Sentiment: Market optimism or pessimism significantly affects demand for VIGIX, driving its price up or down.

Dividend Yields: Changes in dividend yields of underlying stocks in VIGIX influence its total return, affecting its price.

Expense Ratio: The fund's expense ratio, while relatively low, subtly impacts returns and long-term price performance.

Fund Flows: Large inflows or outflows of investment dollars can cause temporary price fluctuations due to buying or selling pressure.

Interest Rate Changes: Rising interest rates can make bonds more attractive, potentially reducing demand for stocks and impacting VIGIX's price.

Sector Performance: The performance of sectors heavily represented in VIGIX, such as technology or financials, influences its overall return.