The price of DFTEX.US, a Dimensional Fund Advisors equity fund, is influenced by several factors. Market Performance: Overall stock market trends, especially within the sectors and geographies the fund invests in, directly impact its net asset value (NAV). A rising market generally increases the fund's value. Fund Holdings Performance: The performance of the individual stocks and other securities held within the fund is crucial. Positive returns from key holdings boost the fund's overall performance. Expense Ratio: While not directly impacting daily price fluctuations, a higher expense ratio gradually reduces returns over time, affecting long-term price growth compared to similar, lower-cost funds. Investor Demand: Increased investor demand for the fund can drive up its price, particularly if the supply of shares is limited. Conversely, large redemptions can put downward pressure on the price.