Stock in Apple Inc, the most valuable firm in the U. S., on Wednesday suffered its worst trading day in nearly four years.

In the top 100 companies on the NASDAQ, Apple accounted for the whole of the decline. It lost of 1.1 per cent from the previous trading, decreasing the market capitalization of the company by $35 billion.

The iPhone/iPad-maker's market capitalization or market value currently stands at around $507 billion.

However, Dow industrials that do not include Apple as a component saw their best day since 28th of November. Rex Macey, chief investment officer at Atlanta-based Wilmington Trust, said that the Nasdaq was down due to Apple's decline.

Speaking on the topic, Macey said, "Today's move is because of index weightings, with the Nasdaq down because of Apple's decline. The S&P is up because Apple isn't as big a weight in that index, and the Dow is up even more because it isn't there at all."

Stocks in other companies gained strength after President Obama told a group of chief executives officers that a fiscal cliff deal could be announced in around a week in case Republicans agreed on the need to raise taxes on the wealthy people in the country.

The Nasdaq Composite Index slipped 0.77 per cent to close at 2,973.70 points, while the Dow Jones industrial average and the Standard & Poor's 500 Index gained 0.64 per cent to
13,034.49 points and 0.16 per cent to 1,409.28 points, respectively.