Group 1 - The core point of the article highlights the fund flow status in the U.S. market for the week ending September 24, showing varied trends across different types of funds [1] Group 2 - Investment-grade bond funds saw an inflow of $1.83 billion, slightly down from the previous week's inflow of $1.86 billion [1] - High-yield bond funds experienced an outflow of $365.3 million, a significant change from the previous week's inflow of $938.5 million [1] - U.S. Treasury funds had a substantial inflow of $7.89 billion, marking the largest inflow since the week of April 9, up from $1.8 billion the previous week [1] - Leveraged loan funds recorded an inflow of $162.4 million, an increase from the prior week's inflow of $125.2 million [1] - Mortgage-related funds saw an inflow of $205.6 million, compared to $125.9 million in the previous week [1]