TY - JOUR AU - Bates,Thomas W. AU - Kahle,Kathleen M. AU - Stulz,Rene M. TI - Why Do U.S. Firms Hold So Much More Cash Than They Used To? JF - National Bureau of Economic Research Working Paper Series VL - No. 12534 PY - 2006 Y2 - September 2006 UR - http://www.nber.org/papers/w12534 L1 - http://www.nber.org/papers/w12534.pdf N1 - Author contact info: Thomas W. Bates Eller College of Management 315D McClelland Hall Tucson , AZ 85721 E-Mail: batest@email.arizona.edu Kathleen Kahle McClelland Hall P.O. Box 210108 Tucson , AZ 85721-0108 E-Mail: kkahle@eller.arizona.edu Rene M. Stulz The Ohio State University Fisher College of Business 806A Fisher Hall 2100 Neil Avenue Columbus, OH 43210-1144 Tel: 614/292-1970 Fax: 614/292-2359 E-Mail: stulz_1@cob.osu.edu AB - The average cash to assets ratio for U.S. industrial firms increases by 129% from 1980 to 2004. Because of this increase in the average cash ratio, American firms at the end of the sample period can pay back their debt obligations with their cash holdings, so that the average firm has no leverage when leverage is measured by net debt. This change in cash ratios and net debt is the result of a secular trend rather than the outcome of the recent buildup in cash holdings of some large firms. It is concentrated among firms that do not pay dividends. The average cash ratio increases over the sample period because the cash flow of American firms has become riskier, these firms hold fewer inventories and accounts receivable, and the typical firm spends more on R&D. The precautionary motive for cash holdings appears to explain the increase in the average cash ratio. ER -