S&P 500 companies expect declining earnings and profit margins for Q4

S&P 500 companies are poised to see a 2.1% decline in earnings along with net profit margins of 10.7% , FactSet data show, based on reports from the companies that have so far reported their results from the fourth quarter of 2019.

Why it matters: Both numbers suggest overall weakness in 2019, analysts say.

What it means: "If 10.7% is the actual net profit margin for the quarter, it will mark the first time the index has reported four straight quarters of year-over-year declines in net profit margin since Q4 2008 through Q3 2009," FactSet senior earnings analyst John Butters writes.

• "Eight of the 11 sectors are reporting a year-over-year decline in their net profit margins in Q4 2019, led by the Energy (4.7% vs. 7.4%), Information Technology (21.4% vs. 22.7%), and Consumer Discretionary (5.9% vs. 7.0%) sectors."

Go deeper: The S&P 500 could be overvalued