$FB, $AMZN &amp; $GOOG have a total weighting of 9.6% in the S&amp;P 500. That means the aggregate weighting of all 3 companies exceeds 6 entire sectors of the S&amp;P: $XLP (7%), $XLI (7%), $XLE (3%), $XLU (3%), $XLRE (3%) &amp; $XLB (2%). Read our full take here: https://t.co/qEvM0eKUeV $SPY https://t.co/LQkqO3TSLs