S&P 500 futures down 51 points, NYSE invokes rule 48

The late-August rebound in risk assets might have been an illusion caused by month-end, thin liquidity or (more likely) emotional markets.

The focus is back on global growth today after the final China PMI continued to show a contraction in the manufacturing sector. That shouldn't have been a surprise the fear today is more likely about positioning into the month.

The economic calendar is jam-packed in the month and Fed hike probabilities have rebounded to 40%.

Coming up

The economic calendar features a few highlights but the main one (by far) is the ISM manufacturing report at 1400 GMT (10 am ET). Otherwise, it's all about watching the market.