NBMLX.US, being a mutual fund, its price, technically the Net Asset Value (NAV) per share, fluctuates based on several factors: Market Performance: The overall performance of the assets (stocks, bonds, etc.) held within the fund's portfolio directly impacts its price. A rising market generally leads to a higher NAV.

Fund Expenses: Management fees, operating expenses, and other costs are deducted from the fund's assets, which can slightly reduce the NAV.

Investment Strategy: The fund's investment strategy, whether growth, value, or a combination, determines the types of assets held. The performance of those specific asset classes influences the fund's price.

Interest Rates: Changes in interest rates can affect the value of fixed-income securities (bonds) held in the fund. Rising rates can lower bond values, potentially decreasing the NAV.

Economic Conditions: Broader economic conditions, such as inflation, unemployment, and GDP growth, influence investor sentiment and market performance, indirectly affecting the fund's price.

Fund Flows: Large inflows or outflows of money into or out of the fund can force the fund manager to buy or sell assets, which might impact the fund's price, especially for smaller funds.

Currency Exchange Rates: If the fund holds assets denominated in foreign currencies, fluctuations in exchange rates can affect the fund's value when translated back into the base currency (USD).