How seriously should people take Donald Trump’s claim that stocks would crash if he were kicked out of office? As you mull over an answer, consider what someone in the other party would say.
Maybe there’s a less subjective way to judge -- with earnings estimates, perhaps, which have changed a lot during his presidency. Or maybe valuation. Neither is perfect, but nor is any quest for science in the stock market.
Before digging in, acknowledge that stocks have enjoyed unusually strong gains since Election Day, with the S&P 500 rising at an annualized rate of 20 percent, crushing the

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