The power of the night effect was observed in large- and small-caps as stocks fell on Wednesday. At market close Wednesday, there was a 150 basis point spread between the prior night and day performance of the SPDR S&P 500 ETF Trust (SPY), and the spread between the prior night and day performance of the iShares Russell [...] The post Night Effect Seen as Large- and Small-Cap Stocks Fell on Wednesday appeared first on ETF Trends .