On the upside
Shares of Palo Alto Networks (NYSE: PANW) surged in its market debut.
Kayak (Nasdaq: KYAK) stock soared on its first trading day.
On the downside
Shares of Vivus (Nasdaq: VVUS) extended its losses as investors locked in profits on the biopharmaceutical.
Societe Generale upgraded Nokia (NYSE: NOK) to a Hold rating but the stock price fell as investors locked in profits.
Shares of Banco Santander (NYSE: SAN) fell as Spain's borrowing costs soared.
In the broad market, declining issues outpaced advancers by a margin of nearly 7 to 3 on the NYSE and by 5 to 2 on Nasdaq. The Russell 2000 which tracks small cap stocks plunged 8 points to 793.