(CBS) — Stocks closed narrowly mixed Wednesday after the Federal Reserve’s minutes from its September meeting affirmed expectations of an interest rate hike in December.

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The NASDAQ dropped 7, The S&P 500 added 2 and the Dow Jones Industrial Average closed up 15 points, settling to 18,144.

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“As a political economist, I am looking at these markets and am in wonderment on how closely they are mirroring what is going on in not only the elections here in the US, but also with what’s happening over in the UK and their talks of Brexit,” said Andrew Busch, Editor of the Busch Update in Chicago.

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He added that further delays in an interest rate hike by the Federal Reserve could hurt their credibility.