Have you checked News Corp.'s (NYSE: NWS) stock price lately? It's pretty close to the 52-week low. Last Thursday, before the Fourth of July holiday began, News Corp.'s shares closed at $14.76. The 52-week low is $14.58, and the 52-week high is $24.95. As can be seen, it's had quite a fall. And what about competitor Viacom (NYSE: VIA)? The company's stock closed on Thursday with a price of $29.70. That was, in fact, the 52-week low. The 52-week high for Viacom is $44.95. Again, a pretty big dive.

Is it time to enter these two names? From a valuation perspective, considering their growth prospects, the stock prices do make one pause for consideration. They seem cheaper than colleagues Disney (NYSE: DIS) and Time Warner (NYSE: TWX) from certain angles, although the latter two media businesses do have higher dividend yields. But with the big decline in the stock prices, traders certainly have to be looking at them as perhaps candidates for a bounce-back in the second half of the year, especially if the oil situation improves.

I think that's the big problem here. With oil and financials acting in negative ways for the economy, the entire market is one huge growling bear in a bad mood. And that has made me very reticent about initiating a trading position in either News Corp. or Viacom, though I really, really am interested in doing so. I think value trades like this might very well simply be tests of patience at this point. I sense that both these stocks will be higher by the end of the year, but so what? These stocks will probably merely move along with the rest of the major averages, and that movement could be in the downward direction. And News Corp. has been having issues with MySpace.

A collection of widely traded stocks making 52-week lows often shows sentiment for which industries and investing themes are out of favor.

Some of last week's lows:

Level 3 Communications (NASDAQ: LVLT): The company has one of the largest data and voice networks in the country. But pricing pressure on bandwidth costs and trouble integrating acquisitions did a tremendous amount of damage to the shares when the firm announced third quarter numbers. The stock traded as low as $2.90, down from a 52-week high of $6.80. But, LVLT's real sin is the amount of debt it carries -- almost $7.4 billion. The current market hates balance sheets that indicate too much borrowing.

A look at a list of 52-week lows sometimes signals market sentiment about certain sectors or broader financial trends. Here are a few critical bottoms hit last week:

Level 3 (NASDAQ: LVLT) would seem to be a poster child for the new demand for bandwidth. It has a huge national network covering 48,000 miles and a first-rate customer base including big telcos and cable companies. It also carries a lot of VoIP traffic. The company hit a 52-week low because it has something Wall Street hates right now -- a ton of high-yield debt backed by shaky cash flow. The debt is over $6.8 billion, and LVLT has had negative operating income for each of the past three years. The stock is being sold off just before earnings because any sign of weak earnings is exposure to significant balance sheet problems. Borrowing is not popular these days.

Toyota (NYSE: TM) should be riding high. It has passed General Motors (NYSE: GM) as the world's largest car company and is more profitable than any of its global peers. But, hyper-growth may be catch up with the Japanese company. It slipped from the top spot in the Consumer Reports vehicle reliability survey and had to recall 470,000 cars in its home market. GM's new UAW contract will also make it a rougher competitor.