One of the prevailing ideas in several theories of financial market agent behaviour is that crashes occur when all or at least most participants’ horizons synch

One of the prevailing ideas in several theories of financial market agent behaviour is that crashes occur when all or at least most participants’ horizons synchronise, leading to everybody acting on the same information uniformly. This is likely what is occurring: probably most investors are focussing on the here-and-now and thus on stopping their losses and/or reducing their exposure to risk.