Interest Rates: Rising rates can decrease FMCCX.US's value as bond yields become more attractive. Conversely, falling rates can increase its value.

Credit Risk: Downgrades in the creditworthiness of mortgage-backed securities within the fund can lower its price. Conversely, upgrades can increase it.

Prepayment Risk: Faster mortgage prepayments than anticipated can reduce FMCCX.US's income and principal, negatively impacting its price.

Economic Conditions: A strong economy can improve housing market conditions, potentially boosting FMCCX.US. A weak economy can negatively affect it.

Inflation: High inflation erodes the value of fixed-income investments like FMCCX.US, potentially decreasing its price.

Fund Flows: Large outflows from FMCCX.US may force the fund to sell assets, potentially lowering prices. Inflows can have the opposite effect.

Market Sentiment: Investor confidence or fear can influence demand for mortgage-backed securities, impacting FMCCX.US's price independently of fundamentals.