A bit less than two hours into the session, modest early selling has ramped up, with the Dow down 2%, the S&P 1.75%, and Nasdaq 1.1%.
The 10-year Treasury yield is off two basis points to 2.83%.
Slight declines in Europe have grown as well, with Theresa May's pulling of a Brexit vote (and subsequent euro strength) a convenient excuse. The Stoxx 600 is down 1.6%. The FTSE is off just 0.5%.
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