"Cliffs are in fashion this fall," economist Ed Yardeni writes. Not only is there the fiscal cliff, there's the political cliff and the revenue cliff. “If they fall off of it,” says Yardeni, "so will the profit margin." Which makes for an earnings cliff too. Then there's the "capital strike," described by Barclays' Barry Knapp as industry's reluctance to invest until we know the election result and whether the fiscal cliff will be averted.