Take a look at some of Friday's midday movers:
Amazon.com - The online retailer fell as analysts voiced concerns about its spending on technology, content and new warehouses.
Diamond Offshore Drilling - The driller climbed after it reported a first-quarter profit of 93 cents a share, topping estimates for 65 cents.
Ford Motor - The car manufacturer declined after first-quarter earnings disappointed.
KLA-Tencor - The technology company fell after B Riley downgraded its shares to "neutral" from "buy."
LifePoint Hospitals - The rural hospital operator rose after posting first-quarter earnings that beat expectations. Other healthcare names also gained, including Tenet Healthcare and Community Health Systems.