Most firms deleverage from their historical peak market-leverage (ML) ratios to near-zero ML, while also markedly increasing cash balances to high levels. Among 4,476 nonfinancial firms with five or more years of post-peak data, median ML is 0.543 at the peak and 0.026 at the later trough, with a six-year median time from peak to trough and with debt repayment and earnings retention accounting for 93.7% of the median peak-to-trough decline in ML. The findings support theories in which firms deleverage to restore ample financial flexibility and are difficult to reconcile with most firms having materially positive leverage targets.