What does ‘SURGE’ mean in an IP Report?

When viewing an IP (Inventory Purchase) Report the word ‘SURGE’ sometimes appears along with an item number.

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‘SURGE’ identifies an item when more than 50% of the item’s movement for the last 12 months occurred in a single month if there was movement in at least 3 separate months.  In the screen shot, the item had movement of 58 pieces in 5 separate months.  Thirty two pieces (55.17% of 58 pieces) were sold in a single month so the item is identified with ‘SURGE’.