S&P 500 top and bottom performers at about 12:00 p.m. EDT

Bloom Energy +12.6%, Carnival +11.9% and Lumentum +6.5% led; Fair Isaac -26.8%, United Rentals -5.0% and Nucor -3.3% lagged. S&P 500 down 0.28% at 7,662.55, with 6 new 52-week highs and 29 new lows as of 12:00 p.m. EDT.