(Updates with the latest stock movement in the first paragraph and headline.)
Alcoa (AA) shares were down 3.2% in Friday trading after the company's fiscal Q2 results trailed analysts' estimates.
The company reported fiscal Q2 non-GAAP net income late Thursday of $2.12 per diluted share, up from $0.39 a year earlier.
Analysts polled by FactSet expected $2.25.
Revenue for the quarter ended June 30 was $3.97 billion, up from $3.02 billion a year earlier.
Analysts expected $3.99 billion.
Price: $45.33, Change: $-1.52, Percent Change: -3.24%