Market-on-Close (MOC) order imbalances influence equity market flows, reflecting trends in institutional buying and selling that can impact short-term market movements. Institutions place MOC orders to buy or sell stocks at the closing price, with imbalance data released shortly before the market closes.
In the last five sessions, three ended with net inflows and two with outflows. On September 2, 2025, there was a significant buy-side imbalance of $864 million, exceeding the 20-day moving average. This suggests strong institutional buying activity.
Here’s a quick look at recent imbalances:
– **August 29:** $104 million net buy imbalance
– **August 28:** -$387 million net sell imbalance
– **August 27:** -$33 million net sell imbalance
– **August 26:** $190 million net buy imbalance
The latest data indicates a bullish market trend, especially since the September 2 inflows followed two days of outflows. While this signals short-term support for stocks, traders should also consider additional factors and indicators for confirmation. MOC imbalance data should be part of a broader strategy, not a standalone signal.
Given the strong institutional buying noted recently, derivative traders may want to position for short-term gains in equities. The $864 million buy-side imbalance on September 2 signals that large funds are investing heavily. This points to a bullish trend in the coming weeks.
Such positive momentum is a great opportunity for buying short-term call options on major indices like the S&P 500 (SPX) or Nasdaq-100 (NDX). With institutional backing, options expiring in late September or early October could benefit from continued upward movement. The aim is to leverage these large capital inflows before market sentiment changes.
This bullish outlook is reinforced by recent economic data. The August 2025 jobs report showed the economy added 195,000 jobs, surpassing expectations of 180,000. This indicates a strong labor market, giving institutions confidence to increase their equity investments. The favorable economic news aligns well with the significant buying we observed at the market close.
Moreover, market volatility is decreasing, making bullish strategies more appealing. The CBOE Volatility Index (VIX) has dropped below 15, landing at 14.5, its lowest point since July 2025. A lower VIX indicates reduced market fear, which can make options, especially calls, more affordable.
For those with a more conservative approach, selling out-of-the-money put credit spreads is another option. This strategy allows you to collect premium based on the expectation that the market will either rise, stay steady, or decline only slightly. The recent drop in the VIX makes this strategy especially timely, reflecting a calmer market for such trades.
Historically, we saw a similar trend of strong institutional inflows after uncertainty in late 2024, which led to a 4% rally in the S&P 500 over the following three weeks. While past performance isn’t a guarantee, it serves as a useful reference for how markets react to strong buy-side signals.
However, we should remain cautious, as these flows can reverse quickly, as we saw on August 27 and 28. Therefore, traders should apply defined-risk strategies or set clear stop-loss levels. While the current data suggests a bullish trend, it is just one part of a larger puzzle that needs ongoing attention.
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