Monetary funds are different from other funds. Publish two data every day. One is the seven-day annualized rate of return, which is a short-term indicator. The income within seven days is stretched to the unreliable rate of return obtained within one year.
The annual real rate of return of the money fund is only 3-5%.
The money fund didn't increase much that day, and the 0.5 you said should be 50 cents a day.