Pfizer reported a 19.7 percent rise in quarterly revenue, boosted by sales of its new treatments for cancer and its Hospira acquisition.
Sprint, the No.4 U.S. wireless carrier, said its quarterly revenue fell 2.5 percent as it gave big discounts to attract more subscribers.
Swiss bank UBS' wealth management business attracted strong inflows, but said it saw "abnormally low" transaction volumes in the first quarter.
Now that the top US tech companies have reported earnings, analysts are weighing in on the big themes.
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