Option traders snapped up contracts across the board in Crocs, which ventured into the top 10 most actively traded contracts by volume at the midweek point, with activity concentrated on the put side of the July '07 series at the 40.0 strike, and on the call side at the 45.0 strike.

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Option traders snapped up contracts across the board in Crocs (nasdaq: CROX - news - people ), which ventured into the top 10 most actively traded contracts by volume at the midweek point, with activity concentrated on the put side of the July '07 series at the 40.0 strike, and on the call side at the 45.0 strike.

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It also has the potential to be a problem for funds like Fairholme that hold a limited number of stocks (FAIRX holds just 20 stocks and seven bonds), but you need consider the average volume of each holding (aka liquidity) before viewing a concentrated portfolio as a red flag.

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The high volume required to support the dollar-slice stores means that nearly all the dollar pizzerias are concentrated in Manhattan.

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Call volume swelled to about four and a half times the number of puts traded on Friday afternoon, concentrated at the August 40.0 strike, where more than 60, 000 lots, and the 42.5 strike, where more than 15, 000 lots had moved as of Friday afternoon.

FORBES: Magazine Article