Stocks giving up Tuesday's gains ahead of open. $SPX $NDX $DJI $RUT.  $VIX back above 40 &amp; Oil hit 18-year lows of $19.20. $TSLA initiated with buy at $GS

Upgrades: $TGT  $JD $GIS $CPB
Downgrades: $V  $MA $KR $AEO

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