There were worries about the rapid drop in oil price, upcoming election in Greece, and upcoming ECB meeting. However, the real reason behind over 300 point decline in the U. S. stock market was deferred profit taking by those investors who held off taking profits in 2014 in order to defer taxes into 2016. Such selling is not yet complete.
Mario Randholm Blog. Mario is the founder of Randholm & Co. S.A.C., an investment management company dedicated to producing superior returns for its clients and employees by adhering to mathematical and statistical methods.