Treasury Yields: TRSPX invests heavily in U.S. Treasury securities. When Treasury yields rise, bond prices typically fall, decreasing the fund's net asset value (NAV).

Interest Rate Expectations: Anticipation of future interest rate hikes by the Federal Reserve can negatively impact TRSPX's price as investors may sell existing bonds to purchase newer ones with higher yields.

Inflation: High inflation erodes the purchasing power of fixed-income investments, leading to potential declines in bond values and thus TRSPX's NAV.

Credit Risk: While U.S. Treasuries are considered low-risk, any perceived increase in the risk of the U.S. government defaulting could negatively impact the fund's value.

Fund Flows: Large outflows from TRSPX may force the fund manager to sell holdings, potentially driving down the price. Conversely, large inflows could have a positive impact.

Market Sentiment: General investor confidence or anxiety can influence bond prices. Risk-off sentiment often favors Treasuries, while risk-on sentiment may lead to selling.

Economic Growth: Strong economic growth may lead to higher inflation and interest rates, negatively impacting bond prices. Slow or negative growth might have the opposite effect.

Geopolitical Events: Global political or economic instability can increase demand for safe-haven assets like U.S. Treasuries, potentially boosting TRSPX's price.