The turbulent economic climate and the approaching presidential election have impacted on US consumer internet activity in the top online properties in September, it has been announced.

Web resource comScore explains Americans have been following the latest news on the markets and watching their own personal finance accounts as the fiscal environment changes.

Jack Flanagan, executive vice-president of comScore Media Metrix, comments: "The ability to track the market on a minute-by-minute basis and access banking and trading accounts quickly enables Americans to make financial decisions in real-time."

Yahoo! Finance led the business/finance category, with almost 20 million visitors, a jump of 30 percent from August.

Politics also reigned as the top-gaining category for the second month in a row, with a 43 percent rise to more than 20 million visitors.

Google sites continued to lead as the most visited property over the course of the month, with more than 144 million individuals using the site.

Meanwhile, a study by the Pew Internet & American Life Project found households with a married couple and minor children are more likely to use the internet and use cell phones.