FILE- In this Sept. 6, 1947, file photo Dolores Hennessy, bulletin clerk in the quotation department, changes bid and asked prices on the information relayed to her from the central tube room in New York. The lettered cards carry symbols for Curb Exchange stock issues while the numbered cards show the current market in those issues. The S&P 500, the stock market’s benchmark index, has climbed in the 12 months after each of the midterm elections going back to 1946. That’s 18 elections, many of which ended up shuffling the balance of power in Congress. (AP Photo/Dan Grossi, File)
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