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 teen-oriented apparel retailer Aeropostale (NYSE:AROPQ) plunged 14% today after the company's quarterly results and outlook disappointed Wall Street.

So what: The stock has plummeted over the past year on rapidly declining fundamentals, and today's fourth-quarter results -- adjusted loss of $0.35 on a revenue drop of 16% -- coupled with downbeat guidance suggest that things are only getting worse. In fact, Aeropostale also announced a strategic deal with Sycamore Partners which will provide a $150 million loan, reinforcing serious concerns on Wall Street over the company's suddenly stressed liquidity position.

Now what: Aeropostale now sees a first-quarter loss of $0.70 to $0.75 per share, much larger than Wall Street's view of only a $0.17 per-share loss. "We are moving aggressively and taking swift actions across all areas of our business that we expect will improve our operational and financial performance over time," said CEO Thomas Johnson in a press release. "The commitment letter for a strategic partnership and financing that we announced today more strongly positions the Company and provides us with the flexibility to continue executing on our strategies designed to reposition the Aeropostale brand." When you couple the gale-force competitive headwinds facing Aeropostale with its very real cash concerns, however, conservative Fools would probably do well to sit tight on the sidenlines.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.