Needham analyst Laura Martin told CNBC that investors turned to Apple on Tuesday because the company has prodigious cash flow, allowing it to endure any slowdowns in the economy and take advantage of falling prices. "There's a flight to quality with companies that you know will weather the storm, not go bankrupt, not have financial distress," Martin said, noting that other large-cap tech stocks aren't down as much as smaller firms […] Martin said there are indications that Apple's current products, especially its iPhone Pro models, are selling well, potentially leading to a big December quarter for the company. Apple said in October it expected record revenue in its fiscal first quarter, over last year's $111.4 billion in sales, despite supply constraints. "Lots of really good numbers coming out of retail about how the products are selling. Tablets, especially the high-end iPhones, all of which says they're going to have high margins and high revenue for the fourth quarter of this year," Martin said.