Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of fashion-forward clothier Aeropostale (NYSE: ARO) got tossed in the hamper today, with shares falling by as much as 16%.

So what: The company said that sales in the most recent quarter, which ended in April, dropped 7% and that earnings per share would be around $0.20, below a previous outlook range of $0.35 to $0.38. At least one analyst from Brean Murray Carret & Co. downgraded the stock after the announcement.

Now what: The fashion market is fickle, and it appears that Aeropostale is very out of style right now. Today's news was also mixed from competitor gap Gap (NYSE: GPS), which announced that first-quarter sales were down 3% even though April same-store sales were up 8% from last year. I'm definitely going to sit out this move until we get a clear indication of whether Aeropostale is missing out on seasonal trends or whether the market has passed it by.

Interested in more info on Aeropostale? Add it to your watchlist.

Fool contributor Travis Hoium has no position in any company mentioned. You can follow Travis on Twitter at @FlushDrawFool, check out his personal stock holdings, or follow his CAPS picks at TMFFlushDraw.

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