A technical indicator that purportedly predicts a bear market or a crash when there is a large number of 52 weeks highs and 52 week lows on the NYSE. There is disagreement on the threshold. Some say 2.5% or 2.8% of issues traded on NYSE in a day. Named after the German zeppelin that caught fire on May 6, 1937.
Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University