The market opened lower after two days of losses but quickly recovered.
Health of banks, particularly in Europe, causes concerns.
Technology stocks were trading heavily, particularly Facebook, Yahoo, and Twitter.
Newly created real estate sector thrives in S&P 500.
Nasdaq closes at record high; global markets respond too.
Fed policy meetings still to come later this week.
Banks making some of the biggest gains, Apple drags.
Deutsche Bank plunges 9% after saying it won’t settle claims.
3Q earnings expected to show large improvement.
Market buoyed by Apple's best 4-day run since 2014.
