Looking back, the financial lives many Americans enjoyed until just a few years ago can seem like a mirage.

On a suburban cul-de-sac northwest of Atlanta, Michael and Patricia Jackson are struggling to keep a house worth $100,000 less than they owe. In a small town in West Virginia, Michael Bobic, who last year lost his job as a college professor, sells Star Trek collectibles on eBay to get by.

The Great Recession claimed nearly 40 percent of Americans’ wealth, the Federal Reserve reported last week. The new figures, showing Americans’ net worth has plunged back to what it was in 1992, left economists shuddering while sharpening attention on the pocketbook issues at the center of the presidential campaign.