Famous cruise line entity Carnival Corp. (NYSE: CCL), which competes with Royal Caribbean (NYSE: RCL) and The Walt Disney Company's (NYSE: DIS) vacation voyages, reported earnings for the third quarter on Thursday. The company held up well during the summer months. Revenues increased 11% to $4.8 billion. Earnings per diluted share did decrease slightly from a year ago, dropping two pennies to $1.65. But management reported that the number was better than expected because of lower costs and the positive effect of an insurance recovery. As far as Wall Street estimates were concerned, the bottom line beat by a wide margin. This item says that Carnival bested estimates by $0.07.

Another cool thing is that Carnival narrowed its fiscal-year guidance in a most positive way. Before, the company expected that it would book earnings somewhere between $2.70 and $2.80 per share. Well, now management thinks it'll do between $2.79 and $2.81. That shows confidence in the business, and it looks like the market is pretty happy with the results. Taking a look at the stock at the time of this writing, I see that is up almost 3%, and that volume is decent so far.

I personally would not buy Carnival at this time, however, even though there are some sound elements to this story. It does sport a very good dividend yield of 4%, but it's not close to the 52-week low, and one could argue that the upgraded guidance is confirmation that the stock could be a buy. Still, the market is volatile, the economy is questionable, and energy prices remain a concern. Plus, the earnings release did note some weakness in occupancy levels for advance bookings. I'd be fearful of looking at Carnival before a pullback brings the stock in a little. Long term, though, I do think the company will prosper, since I think it is a great brand in the leisure business.

Disclosure: I own Disney; positions can change at any time.

Carnival Corp. (NYSE: CCL), a provider of cruise vacations and competitor of Royal Caribbean (NYSE: RCL), issued its Q2 earnings numbers on Thursday. Revenues rose more than 16% to $3.4 billion. Net earnings were 49 cents a share. That wasn't too impressive, considering that it was a penny better than the previous year's quarter. However, according to Briefing.com, Carnival killed the earnings expectations of analysts by 8 cents. Net sales were also higher than what Wall Street's expectations.

This performance sent the stock up more than 5%. I think investors need to be a little careful here because Carnival's management has become cautious about the next quarter because of energy costs. The company expects earning of $1.56 to $1.58 per share in Q3. Last year's Q3 saw bottom-line income of $1.67 per share. So, growth will not be found in next quarter's report.

Yet, again, the market didn't seem to mind, as it was high off the expectations-beating data. Is Carnival, therefore, a buy? Well, I don't think it's overly expensive considering the P/E ratio and the yield attached to the stock. But the direction of oil prices has me concerned. Not only will that increase costs for Carnival, but it will compete with the discretionary dollars of potential vacationers. I see the valuation case, but the current state of the market makes me reluctant to pull the trigger on this stock. Some would argue that all this is baked into the shares since they did so well yesterday, but I'm not convinced.

Disclosure: I don't own any company mentioned here; positions can change at any time.