Apple will disclose its fourth quarter business performance later today, and analysts expect the company to continue to impress.

The company's news emerges as concerns at the extent of the US sub-prime loan housing crisis seem set to impact global financial markets this week, with all stocks opening down on early trades this morning.

Apple's singular success seems the focus of analyst attention, however, with investors eager to access the first impact of Apple's subscription-based accounting for Apple TV and iPhone sales.

Analysts across the board expect healthy news from the company. Apple's own revenue target for the current quarter was $5.7 billion, but analyst consensus anticipates the company will instead reach $6 billion or beyond.

Shaw Wu of American Technology Research, who has a "buy" rating on the stock with a $185/share price target, explained: "While Apple shares will likely be volatile given high expectations and its superstar performance, we advise investors to take advantage should Apple shares pull back on short-term concerns."

"We anticipate Apple will beat its guidance substantially driven by broad strength across product lines and an unseasonably favourable mix towards the high-end," he observed.

The analyst expects Apple to reveal that it has sold 11 million iPod sales, 900,000 iPhones and 2 million Macs during the fourth quarter. Wu predicts Apple will achieve $8.1 billion in revenue in the coming Christmas quarter.

These estimates are being echoed by others across the analyst community, a CNN report explains. Consensuse sales estimates from Thomson FirstCall call for 2 million Macs, 10.9 million iPods and 928,000 iPhone sales in the quarter Apple will reveal today, for revenue of $6.05 billion.

Piper Jaffray analyst Gene Munster is slightly more aggressive in his estimates, predicting 2.1-2.3 million Mac sales, 10-11 million iPod sales and 1.05 million iPhone sales will be disclosed when Apple reveals its results for the quarter.