Market Performance: Overall stock market trends influence FNDSX's value, mirroring broad market gains or losses.

Index Changes: Modifications to the underlying index (Russell 1000) can impact FNDSX if holdings are adjusted.

Economic Data: Economic indicators like inflation, GDP growth, and employment figures affect investor sentiment and, therefore, fund prices.

Interest Rates: Changes in interest rates can influence valuations, particularly for companies with significant debt or future growth expectations.

Company Performance: The performance of individual companies within the fund's portfolio directly affects its overall value.

Investor Demand: High demand drives prices up; increased selling pressure pushes prices down.

Fund Expenses: Operating expenses and management fees deducted from the fund's assets reduce returns.

Currency Fluctuations: If FNDSX holds international stocks, exchange rate changes can affect its dollar value.