There Were Only 9, from Kora Reddy
There were only 9 instances instances in this millennium when $SPY posted 10 day worst loss for 3/4 trading days:
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10-Apr-12
06-May-11
05-May-11
12-Apr-11
24-Sep-10
23-Sep-10
24-Sep-09
18-Apr-05
15-Apr-05