In the last six months, Thursdays have emerged as a challenging day for the market. According to data from Bespoke Investment Group, the S&P 500, tracked by the SPDR S&P 500 ETF Trust (ARCA:SPY), has seen an average decline of 0.54% on Thursdays, making it the worst performing trading day during that period. Meanwhile, Fridays have not shown much improvement, with an average slip of 0.08%. Conversely, Monday through Wednesday have all experienced average gains. This consistency in the pattern has caught the attention of traders seeking short-term seasonal trends. Bespoke's six-month data suggests that investors would have had better results by limiting their exposure to the first three days of the week. More information can be found on the Benzinga.com website.