Specialized "vertical" portals -- those that trade only in certain commodities or components -- also stand a chance of carving a niche for themselves among broad-based "horizontal" portals such as Global Sources, says Sweeney.

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The execution of this trade would involve the purchase of the March 32 call and sell of March 33 call (buying a vertical spread) while simultaneously selling the March 33 call and purchasing the March 34 call ( selling a vertical spread) However, you put it in as one trade (a call butterfly) and then you can fill as one price on the whole trade.

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Nothing has quite prepared you for the spectacle up close: freighters and motor junks forever plying their harbour trade and, beyond them, a Futurama cityscape rising from near vertical jungle slopes.

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We spent a lot of time thinking about macro product management issues (in zynga like ways, but with less malice, and more desire to make lasting value) such as whether single horizontal site vs vertical category sites, minute pricing detail of different types of formats, cross border trade policies and their effect on the marketplaces.

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