Stocks that moved substantially or traded heavily Tuesday on the New York Stock Exchange and Nasdaq Stock Market:
InterOil Corp., down $3.46 at $65.75
A Raymond James analyst downgraded the oil company's stock, saying its newest development partnership could push back other projects.
Alcoa Inc., down $1.07 at $16.70
The aluminum maker reported first-quarter sales that fell short of what Wall Street was expecting.
Skilled Healthcare Group Inc., up $1.03 at $15.05
The nursing home operator said it was exploring a potential sale of the company or some of its real estate assets.
WMS Industries Inc. down $6.21 at $30.01
The company said demand for it slot machines fell in the third quarter, and a Jefferies analyst downgraded the stock.
Aon Corp., down $1.16 at $52.21
A Sterne Agee analyst downgraded the risk management company based on a more cautious performance view of insurance brokers.
Safe Bulkers Inc., down 96 cents at $8.30
The Greek drybulk shipper said it plans to sell 5 million shares of stock to the public to pay for additional vessels and debts.
Extreme Networks Inc., down 50 cents at $2.89
The network equipment provider warned that revenue for its third quarter will likely fall short of expectations.
WebMD Health Corp., up $1.92 at $51.11
The health information website said it expects its first quarter results to exceed expectations, citing higher site traffic.