We have a very few clients who always call or email when the market sells off asking what we should do and why it is happening. The honest answer of course is that the stock market is declining simply because there are more sellers than buyers when panic sets in and investors move to the exits. There doesn’t have to be one specific reason - particularly in today’s algorithmically driven market. There is a proliferation of passive ETFs and mutual funds which are driven primarily by large growth/momentum stocks (i.e. FANG – Facebook, Amazon, Netflix and Google) which have begun to sell off from high valuations. When fear or greed overcomes the market, stock volatility is exacerbated as mathematical algorithms hit certain levels driving sell or buy signals. Thus, selling by computers begets more selling and in the reverse, buying can beget buying.