Market data from April 29 and April 30, 2025, show notable imbalances in the S&P 500, NASDAQ 100, Dow 30, and MAG 7 indices during the market-on-close (MOC) and market-on-open (MOO) periods. On April 29, the S&P 500 experienced a negative MOO imbalance of 162.1 million shares and a positive MOC imbalance of 1.195 billion shares. The NASDAQ 100 and Dow 30 also showed mixed imbalances, with the NASDAQ 100 having a negative MOO imbalance of 7.9 million shares but a positive MOC imbalance of 758.3 million shares, while the Dow 30 had a negative MOO imbalance of 13.4 million shares and a positive MOC imbalance of 304 million shares. The MAG 7 group showed a negative MOO imbalance of 7.8 million shares and a positive MOC imbalance of 347.2 million shares on the same day. By April 30, the S&P 500's MOO imbalance turned more negative at 325 million shares, while the NASDAQ 100 and MAG 7 showed positive MOO imbalances of 38.9 million and 34.7 million shares respectively. The MOC imbalances on April 30 were substantially larger, with the S&P 500 at 2.788 billion shares, NASDAQ 100 at 1.282 billion shares, Dow 30 at 999.8 million shares, and MAG 7 at 1.014 billion shares. The NYSE MOC imbalance was reported as a buy imbalance of $2 billion on April 29 and fluctuated between $1.6 billion and $15 billion in sell imbalance on April 30, with a $6 billion buy imbalance later that day. Additionally, retail-favored stocks showed divergent performance, with Palantir Technologies Inc. (PLTR) rising 5.7% since the S&P 500 peak, while Nike Inc. (NKE) declined by 26%.