10 Things You Should Know About Bear Markets (hartfordfunds.com)

We define a bear market as a decline of 20% or more over a period of at least two months. If this was followed by a 20% rise over a period of at least two months we considered a subsequent fall of 20% or more as a new bear market.

Based on these indices the average bear market decline was about 49% across all markets but the declines ranged from a low of 23% to a high of 92%.

In terms of the length of time a bear market lasted (from the peak of the bull market to the lowest point in the bear phase) this was on average over a year and to be precise, approximately 15 months.

But from a few months to over three years.

Bear Markets – What Can We Learn From History | Mobius Capital Partners