(Source: Business Wire)Speculative investors have been feeling skeptical lately about metal moguls Alcoa Inc. (NYSE: AA) and Freeport-McMoRan Copper & Gold Inc. (NYSE: FCX), judging by data from the International Securities Exchange (ISE). AA boasts a 10-day ISE put/call ratio of 1.01, which ranks higher than 77% of other such readings taken during the past year. In other words, investors have purchased AA's puts at a faster pace just 23% of the time in the previous 52 weeks.

Meanwhile, FCX sports a 10-day ISE put/call ratio of 0.80. This ratio ranks higher than nearly 94% of comparable readings during the past 12 months, revealing a distinctly downbeat bias.

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