Brown Brothers Harriman, an investment management company, released its Q2 2026 investor letter for the "BBH Select Mid Cap ETF". A copy of the letter can be downloaded here. In the quarter, the fund increased 9.7% on a total return basis compared to the Russell Midcap Index's 13.8% return. Artificial intelligence is a key factor influencing market performance, with high-valuation and high-beta companies consistently outperforming others. The portfolio saw gains from being overweight in technology and indus ...