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: SUPERVALU (NYSE: SVU) shares popped 10% in intraday trading earlier, but it's not clear why; there doesn't appear to be any new news to justify bullishness on SUPERVALU today.

So What: The grocery company reported a hairy quarterly net loss and plunging sales last week, and also lowered its earnings guidance for 2011. This company's much-needed turnaround is going nowhere fast, and there's no news today to give investors a more bullish outlook.

Now What: Investors should steer clear of SUPERVALU. It competes with scores of formidable rivals including Safeway (NYSE: SWY), Kroger (NYSE: KR), Wal-Mart (NYSE: WMT), and Target (NYSE: TGT), not to mention plenty of privately held grocers like Wegman's; it's also got a massive debt load that investors shouldn't take lightly. There's no compelling reason to bag up shares of this grocery stock today.

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

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Alyce Lomax does not own shares of any of the companies mentioned. The Fool has a disclosure policy. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.