US equity indices closed higher on Aug 27, led by the Nasdaq Composite, while market-on-close order data showed sell imbalances in the S&P 500, Nasdaq 100, and Mag 7, contrasting with a buy imbalance in the Dow 30.
The Dow's gain was the smallest of the three major indices, yet it was the only one with a buy imbalance at the close, suggesting end-of-day demand was concentrated in blue-chip names rather than tech. The divergence between closing prices (all higher) and sell imbalances in the Nasdaq 100 and Mag 7 indicates late-session selling pressure in large-cap tech even as the broader market finished up.