Yesterday was nightmare for traders, especially for buyers. Th | Stock Shiksha

Yesterday was nightmare for traders, especially for buyers. The downfall was very unexpected and even we failed to see(I have to admit). So what was the reason? It seems technical problem which is related to Quadruple witching day effect which comes 4 times every year in US when all 4 types of F&O contracts get squared off on the same day. Another reason could be expectation for more aggressive stand by Fed and other central banks.