Evidence is offered for log-periodic (in time) fluctuations in the S&P 500 stock index during the three years prior to the October 27, 1997 "correction". These fluctuations were expected on the basis of a discretely scale invariant rupture phenomenology of stock market crashes proposed earlier.
Cite
@article{arxiv.cond-mat/9710324,
title = {Discrete Scale Invariance and the "Second Black Monday"},
author = {James A. Feigenbaum and Peter G. O. Freund},
journal= {arXiv preprint arXiv:cond-mat/9710324},
year = {2015}
}