With this in mind, I consider Barrett's sale to be above-average for his individual profile at Intel. Shorts are sales, but, strictly speaking, volume measures trades, and sales are just one half of a trade. Every short requires a long. So, when calculating volume, ignore one half of every transaction. Theoretically, in fact, it is unlimited, according to Mike Long of Rockbridge Partners , which tracks short-selling.
Shorts can multiply in much the way that credit expands.
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