You saw the headlines. You know your stock price made a big move. But what does that portend for your investment's future?

By pairing the latest news with the collective wisdom of our 170,000-strong Motley Fool CAPS investing community, we might be able to discover whether your stock's latest exploits are a short-term hiccup or the start of a much bigger trend.

The following stocks have all made big moves over the past five days.


CAPS Rating (out of 5)

Change Past Week

China Biotics (Nasdaq: CHBT)



Neoprobe (NYSE: NEOP)



Corinthian Colleges (Nasdaq: COCO)



Source: Motley Fool CAPS; % change May 11-18.

Can't fight this fire
After almost hitting $18 a share at the start of the year, China Biotics has been tumbling ever after, save for a brief dead-cat bounce in April that has since seen the stock test new lows. The most recent setback was an article on wherein the writer thought the company's staffing and sales claims were at best exaggerated. He was comfortable staying "extremely short" the stock.

In May, Andrew Left at Citron Research said China Biotics would probably face trouble when it came time for its audit, which is scheduled for this month. There's a whole universe of small-cap Chinese stocks that came to market through reverse mergers that have since been exposed as frauds or engaging in less-than-honest conduct. Longtop Financial (NYSE: LFT) is simply the most recent example.

Going public by RTO may offer some advantages, but with the steady stream of companies having been revealed as fraudulent entities, there's really little reason to trust that the remaining ones are honest actors. Reverse mergers used to be the province of penny-stock pump-and-dump schemes, and these small Chinese companies certainly seem to fit the mold well.

Highly rated CAPS All-Star joaquingrech says the list of those accusing China Biotics is growing steadily, and he'd simply swear it off: "All in all, it seems that although operational, they have vastly overstated production, income, earnings and most other important figures."

Is this just a case of piling on? The head over to the China Biotics CAPS page and let us know why you think the probiotics purveyor is different.

Testing the depths
I'm not conversant in whether Neoprobe's Lymphoseek -- a marker used to determine the spread of certain solid-tumor cancers into the lymphatic system -- is better than the current standard of care. But I do know that a lot of questions have been raised about whether the company is comparing apples to apples when it doesn't match up with what's being used today.

At an American Society of Clinical Oncology discussion the other day, questions were raised suggesting that the company was doomed to meet FDA resistance because it didn't compare Lymphoseek with the usual blue dye (VBD) and sulphur colloid combination, but rather just the blue dye, where it was able to detect more cancerous lymph nodes.

Neoprobe bulls point out that the combination is actually an "off-label" usage, while Neoprobe has said the FDA won't permit testing for efficacy against something not approved for the purpose. Seems Neoprobe is caught in a bit of a bind, but the market has grabbed hold of the bear case, driving the stock down 30% from its recent highs.

CAPS member Cheesus thinks the FDA will grant approval and notes that the company has another drug waiting in the wings as well.

Lymphoseek has passed two separate phase 3 trials, showing superiority over the drug (blue dye) currently used to detect cancer. There's 450 million right there if they charge the same price as blue dye, but they will charge more if the FDA does in fact give it to the superior label. Their next drug, which is actually their oldest drug, RigScan CR, has an estimate of 3 Billion.

Although almost 60% of CAPS members rating Neoprobe believe it will outperform the market, more than two-thirds of the All-Stars have doubts. Let us know in the comments section below whether you think the Neoprobe can test higher levels again.

Chipping away at value
Along with many others in the for-profit education sector, Corinthian Colleges was surprised by the Education Department's decision to water down the "gainful employment" requirement for schools, postponing the harshest sanctions possible until 2015. Considering the animus the Obama administration has exhibited toward the for-profit sector, it's not surprising that Apollo Group (NYSE: APOL), DeVry (NYSE: DV), and Bridgepoint Education (NYSE: BPI) all surged afterwards.

But the industry still has powerful enemies who somehow think it's surprising that individuals seeking alternative educational opportunities have higher default rates. They've also made much of the fact that the schools have delayed loan-default procedures against them. Although the critics say it's an attempt to "game the system," imagine the hullabaloo they would have raised had the schools actually moved against the students during this economic period.

Yet because these companies are still in the crosshairs, it's difficult to recommend them as an investment right now. Although 83% of CAPS members rating Corinthian Colleges think it can beat the broad indexes, the low two-star rating they've assigned it indicates their belief that there are better places for your money.

Add Corinthian to your watchlist to see whether it can graduate to a new sustainable high.

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.