Stocks extend last week's gain ahead of the open. $SPX $DJI $NDX $RUT  $AAPL WWDC today. 

Upgrades: $WMT $COF $WDC $GPS $MAR $CAG $MKC
Downgrades: $LRCX $KLAC $KHC $AXP $BIIB $CCL $RCL $NCLH

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