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exposure roll 后辊筒
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Armstrong faces considerable legal exposure, and cycling fans are primed to roll their eyes at any equivocation.
WSJ: Lance Armstrong: Would Lance Believe Lance?��Jason Gay
The benefit of this is that you gain exposure to commodities, the long-term trends, because ultimately these contracts will roll over, without having to be right short-term on the spot price of commodities, which is an extremely difficult game.
FORBES: Get into MLPs Through an ETF
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