Interest Rates: DTKXX.US is a money market fund, so its yield and price are highly sensitive to changes in short-term interest rates set by the Federal Reserve (the Fed). When the Fed raises rates, DTKXX's yield typically increases, and vice-versa.

Credit Quality: The fund invests in short-term debt securities. The creditworthiness of these issuers impacts the fund. Downgrades can negatively impact the perceived risk and thus, the price, albeit usually slightly due to the short-term nature.

Supply and Demand: Investor flows into or out of the fund affect its asset base. Large redemptions may require the fund to sell assets, which could marginally affect the net asset value (NAV). Conversely, large inflows can put downward pressure on yields.

Economic Conditions: Overall economic health influences interest rate expectations and the perceived risk of debt issuers. A strong economy might lead to higher interest rate expectations, whereas a recession could prompt the Fed to lower rates.

Fund Expenses: The fund's expense ratio directly reduces the yield available to investors. Higher expenses translate to lower net returns.

Regulatory Changes: Regulations affecting money market funds can influence their investment strategies and yields, which, in turn, can affect their attractiveness to investors and their price.

Inflation: Higher inflation tends to push interest rates upward, which can lead to higher yields for money market funds like DTKXX.US. The inverse is also true.