(CNBC) — For more than a year, Wall Street pros had been treating Donald Trump's candidacy as a sideshow not to be taken seriously.
Now, on the eve of Monday night's first debate between Trump and Hillary Clinton and with polls showing the race a virtual dead heat, it's not a joke anymore.
Instead, top investment minds on the Street are providing clients advice on how to position ahead of the election. Those scenarios now are taking into serious consideration what would happen should Trump prevail.
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