Joe Raedle | Getty Images
The voters vote for throwing their ballot papers just before the polls open in mid-election on 6 November 2018 in Miami.
Democrats led a 7-point advantage before the poll, according to an NBC News / Wall Street Journal poll released Sunday. Data released on Monday showed that more than 35 million people have already cast their vote in early voting, indicating a record rise for the midterm in 2018. In 2014, fewer than 20 million early votes were counted the day before midterms.
"With absolutely nothing on the macro calendar today, and Fed is not scheduled to deliver its rate decision on Thursday, investors have the next several hours to focus on midterm elections," said Jeremy Klein, FBN Securities Market Director, in a note.
"The headlines fear the GOPs lose power in both chambers of Capitol Hill. While stocks would stumble a little in the immediate demand of this unexpected outcome, the dipped would present an unfortunate opportunity, "Klein noted.
Shares have been volatile lately as concerns about the election, coupled with fear of rising prices and a potential decline in The CBOE volatility index, which is considered to be the best way to fear the market, has increased more than 60 percent since the beginning of the fourth quarter.