Stressed market
Days on which the broad-market reference was well below its peak, or unusually volatile.
In Kereon
Charts · Correlation. A day is stressed when, at its close, the market reference named on the page stood 10% or more below its highest close so far, or its last 20 daily returns had an annualized volatility of 25% or more. Each return takes the state of the close it starts from. Every pair is compared between the two sets of returns by Fisher's z (5% FDR).
Also called: stressed market, stressed markets.