SWSFX.US is a mutual fund, so its price (Net Asset Value or NAV) is influenced by several factors. Market Performance: The overall performance of the assets held within the fund (typically stocks and bonds) directly impacts the NAV. If the market rises, the NAV generally rises as well.

Interest Rates: Changes in interest rates, particularly for bond holdings, can affect the fund's value. Rising rates can decrease bond values, while falling rates may increase them.

Fund Expenses: The fund's expense ratio, which includes management fees and operating costs, is deducted from the fund's assets, lowering the NAV.

Investor Activity: Large inflows or outflows of money into or out of the fund can impact the fund manager's ability to effectively invest, potentially affecting performance.

Economic Conditions: Broader economic factors such as inflation, unemployment, and GDP growth can indirectly influence the fund's holdings and, consequently, its NAV.

Company Performance: If SWSFX.US invests in specific companies, the performance of those companies will directly affect the price of the fund. Good company performance would increase the price of the fund.