Hunch. Before rounding, the September jobless rate published on 2 October was 4.175%, so October needs a rise of almost 0.08 points to print 4.3%.
The 4.2% market resolves on the same report: YES if the headline unemployment rate is above 4.2%, so 4.3% or higher, and NO at 4.2% or lower, with later revisions not counting. If the report is not out by 5 February 2027, September's 4.2% decides, which means NO.
We looked for cases where a US monthly jobs report came right after a weak month, when hiring was between zero and 0.05% of all jobs (about 80,000 today) and unemployment rose by 0.1 points. Figures for the two months before had also been cut. We found six such reports from 2000 to 2025, out of 624 monthly reports since 1965. In five of them, unemployment did not fall. (Federal Reserve Bank of Philadelphia; Federal Reserve Bank of Philadelphia)