Several other hedge funds have also recently modified their holdings of MUB.

Source: https://www.americanbankingnews.com/2023/09/12/betterment-llc-buys-82033-shares-of-ishares-national-muni-bond-etf-nysearcamub.html

What I see here is that investors who will benefit from the tax-exempt status the most have a lot of merit in buying into funds like MUB.

Source: https://seekingalpha.com/article/4612285-mub-muni-bonds-still-reasonable-alternative?source=feed_all_articles

With exposure to over 5,000 US muni bonds, I believe MUB offers high yield, low volatility, and capital appreciation opportunities when interest rates fall.

Source: https://seekingalpha.com/article/4612835-mub-for-those-in-high-tax-brackets-consider-this-before-the-recession?source=feed_all_articles