[Net Asset Value (NAV)]: JMAEX.US is a mutual fund, so its price is directly determined by its NAV. This reflects the total value of the fund's holdings (stocks, bonds, etc.) minus liabilities, divided by the number of outstanding shares.

[Market Performance]: The performance of the underlying assets held by JMAEX.US significantly impacts its price. If the stock market (or specific sectors it invests in) performs well, the fund's NAV will likely increase.

[Interest Rates]: Changes in interest rates can affect the value of fixed-income securities held by JMAEX.US. Rising interest rates can lower bond prices and vice versa.

[Fund Flows]: Significant inflows or outflows of investor money can influence the fund's trading activity and potentially impact its NAV, especially for smaller funds.

[Expense Ratio]: While not directly affecting the daily price, the fund's expense ratio (management fees, operating expenses) reduces the overall return, indirectly influencing its long-term price performance.

[Management Strategy]: The investment strategy and stock picking skills of the fund manager influence the performance of JMAEX.US and thus its price.