Expense Ratio: WISMRX's expense ratio directly impacts its returns. Higher expenses reduce the net yield for investors.

Bond Yields: Changes in prevailing interest rates, particularly benchmark bond yields, affect WISMRX's value. Rising yields typically lower bond prices.

Credit Risk: WISMRX's holdings of corporate and other non-government bonds are subject to credit risk, which impacts the fund's value. Downgrades can cause price declines.

Inflation: Unexpected increases in inflation can decrease the real value of fixed-income investments, potentially lowering the fund's price.

Fund Flows: Large inflows can push WISMRX's price upwards, while significant outflows may pressure prices downward.

Management Strategy: The fund's investment decisions and portfolio management can impact its performance relative to its benchmark, affecting its price.

Economic Growth: Strong economic growth can lead to higher interest rates, negatively impacting bond prices and WISMRX's value. Slowdowns can have the opposite effect.