[Market Interest Rates]: Rising interest rates generally decrease the attractiveness of bond funds like SWDSX.US, as newly issued bonds offer higher yields, causing existing bond prices (and thus the fund's NAV) to fall.

[Credit Quality]: Downgrades in the credit ratings of bonds held by the fund can negatively impact its NAV, reflecting increased default risk. Conversely, upgrades can boost the price.

[Inflation Expectations]: Higher inflation erodes the real value of fixed-income securities, leading to a decrease in bond prices within the fund and thus a lower NAV.

[Economic Growth]: Strong economic growth can lead to expectations of higher interest rates and inflation, both of which negatively affect bond prices and the fund's NAV.

[Fund Management Strategy]: The fund manager's decisions regarding duration, sector allocation, and credit selection can influence the fund's performance and price.

[Supply and Demand]: Increased investor demand for SWDSX.US can drive up its price, while increased selling pressure can cause it to decline.