After showing a notable decline at the start of trading on Tuesday, stocks have seen continued weakness over the course of the morning. The major averages have remained firmly in negative territory, although they have moved well off their worst levels of the day.

A variety of sectors have shown notable moves to the downside, as traders express concerns about the outlook for the upcoming earnings season. Trucking, housing, and real estate stocks are turning in some of the market's worst performances.

The worries about the earnings season come as Dow component Alcoa (AA) is scheduled to release its first quarter results after the close of trading, with the release of results from the aluminum producer seen as the unofficial start of the earnings reporting season.

On the other hand, some stocks are bucking the downtrend by the broader markets, with notable strength visible in the gold, tobacco, and health insurance stocks. The gains by gold stocks come amid a rebound by the price of the precious metal.

The major averages have moved to the downside in recent trading, although they remain well off their lows for the session. The Dow is currently down 149.73 at 7,826.12, the Nasdaq is down 26.09 at 1,580.62 and the S&P 500 is down 12.87 at 822.61.

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