ChainCatcher news, according to Bloomberg, BlackRock's actively managed ETF fund iShares Short Maturity Municipal Bond Active ETF (MEAR) has completed a milestone municipal bond transaction through JPMorgan's blockchain platform.The fund purchased a $6.5 million bond issued by the city of Quincy, Massachusetts, marking the first municipal bond fully issued and traded based on blockchain technology. The MEAR fund currently manages approximately $750 million and has updated its prospectus to support bond settlement through the blockchain platform.