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 oil and gas exploration outfit HyperDynamics (AMEX: HDY) don't look very dynamic today, falling as much as 11.5% on intraday trading in moderate volume.

So what: The only real news on HyperDynamics today is an extended letter of intent between the company and Singaporean driller Jasper Drilling, which isn't exactly great news, but also not a disaster. I'm chalking this up to yet another baseless move in a long line of market randomness affecting HyperDynamics.

Now what: The stock has lost 36% of its value since I pegged it as "risky" in mid-February, following a couple of overly enthusiastic pops. Oil drilling is an unquestionably exciting market, what with soaring oil prices and all. But you'd probably sleep better after investing in blue-chip HyperDynamics rivals Anadarko Petroleum (NYSE: APC) or Noble Energy (NYSE: NBL) instead, because this company's potential resources are unproven and very risky.

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