SPDCX.US price fluctuations are influenced by several factors:

Market Interest Rates: Rising interest rates generally decrease SPDCX.US value, as fixed-income investments become less attractive.

Credit Quality: Downgrades in credit ratings of SPDCX.US's bond holdings can lead to price declines.

Inflation Expectations: Higher inflation erodes the real value of fixed income, potentially lowering SPDCX.US price.

Economic Growth: Strong economic data can push bond yields up, affecting SPDCX.US negatively.

Fund Management: The manager's investment decisions and skill impact the fund's performance and thus its price.

Supply and Demand: Increased demand for SPDCX.US can raise its price, while higher selling pressure can lower it.

Liquidity: Lower liquidity in the bond market can increase price volatility and affect SPDCX.US.

Geopolitical Events: Global events can create uncertainty and influence investor sentiment, indirectly affecting SPDCX.US.

Fund Expenses: Higher expense ratios can reduce returns, potentially affecting investor demand and the price.

Maturity and Duration: Longer maturity and duration bonds are more sensitive to interest rate changes.