S&amp;P 500 notches best quarterly performance since 1998                                                    $SPY $QQQ $DJIA $DIA #stockmarket #investing #finance #stocks #gold #silver $SLV $TWTR $GLD $AAPL $TSLA $AMZN $INTC $NFLX $AMD #economy $SPx https://t.co/24ClPk0u3Q