So, how much did clothier

Guess?

(GES) - Get Report

lose today? C'mon guess. Take a guess, because not many investors were.

Half. Guess? lost half of its value today, lately dropping $9.94 to $9.88 after warning about its third quarter. The company said it will report third-quarter earnings below expectations and that it maintains a cautious outlook over the next two quarters. The clothing manufacturer is looking to record earnings of 35 to 38 cents per share, compared to the eight-analyst estimate of a 44-cent profit.

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And investors did not feel like sparing the rod today. Not to Guess? and not to the rest of the retailers in the

S&P Retail Index

, which lately fell 3.4%. Bellwether

Wal-Mart

(WMT) - Get Report

got crushed, falling $2, or 4.1%, to $47, providing leadership, albeit in a negative direction, for the entire sector.