First, a level-set: Monthly data can be immensely volatile, and April’s data could be revised when the May JOLTS rolls around. Plus, JOLTS and other economic reports have been dogged by low survey response rates. If Tuesday’s data, particularly the spike in job openings, doesn’t turn out to be a blip, it could indicate that the US labor market not only is stabilizing but also possibly expanding. For the first time since last June, there are more job openings than job seekers. “It’s an important milestone to give job seekers hope,” said Heather Long, chief economist at Navy Federal Credit Union.