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The best recovery, in absolute terms, was in October 2007. The index had plunged 717 points to 17,998 on 18 October from where it recovered sharply and ended the month at 19,838 - a solid recovery of 1,840 points.
The second best recovery was in April 2007. The index recovered from a 617-point fall on 2 April to 12,455 and ended the month 1,417 points higher at 13,872.