Interest Rates: Rising interest rates generally increase NISXX's yield and price, while falling rates decrease them.

Credit Quality: The creditworthiness of the securities held by NISXX directly affects its perceived safety and thus its price. Lower credit quality can decrease the price.

Supply and Demand: High demand for NISXX tends to push the price up, while increased supply or decreased demand can lower it.

Market Sentiment: Overall market optimism or pessimism can influence investor appetite for money market funds like NISXX, impacting its price.

Fund Expenses: NISXX's expense ratio reduces the net yield paid to investors, indirectly affecting its attractiveness and price.

Maturity of Holdings: The average maturity of the securities held within NISXX influences its sensitivity to interest rate changes, impacting price.

Economic Conditions: Strong economic growth may lead to higher interest rates and potentially higher NISXX prices, while recessions can have the opposite effect.