S&P 500: Worst Monthly Close in 11 Months ImminentS&P 500SP:SPXAlchemyMarketsSPX is heading into month-end with its heaviest bearish monthly close in 11 months. But the bigger issue is not just the size of the drop. It is where the market is weakening. Price is rolling over near the upper end of a long-term rising parallel channel, which makes this a structural warning rather than just a bad month. How the channel was drawn The channel is built around the broader post-2020 advance, but the key feature is the midline. That middle rail has repeatedly acted as a validation zone during the uptrend, and it now overlaps with the 2025 peak region around 6,000 to 6,100. What it means If SPX can stabilise around 6,000 to 6,100, this can still be framed as a sharp reset inside the broader trend. If that zone gives way, the monthly chart starts opening room toward 5,400 to 5,600 over time. How geopolitics plays a part The macro backdrop still looks like an oil-shock style squeeze on growth, margins, sentiment and labour expectations. If geopolitical tension keeps energy pressure elevated, that tends to keep risk appetite fragile even if equities manage a short-term relief bounce. So even if the market bounces, some of the pressure underneath can remain. Under-the-surface context The broader backdrop has weakened too. Across major global indices, fewer stocks were trading above their 200-day moving averages in March than in February, which suggests this is not just a US-only wobble. At the same time, VIX has pushed back above 30. That can raise the odds of a reflex bounce, but this time the SPX/VIX relationship looks more like divergence than clean capitulation.