Finish Line - The maker of athletic apparel slid after Morgan Stanley downgraded the stock to equal weight from overweight.
InvenSense - The chip manufacturer declined after Robert W. Baird downgraded the stock to neutral from outperform.
Las Vegas Sands - The casino operator and competitors including Melco Crown Entertainment and Wynn Resorts dropped after Wells Fargo downgraded the companies to market perform from outperform.
Lennar - The home builder and rivals including Toll Brothers, DR Horton, PulteGroup and KB Home fell after existing-home sales unexpectedly dropped in August.
Shutterfly - The photo-sharing company rose after Reuters reported private-equity firm Silver Lake was in advanced talks to buy the company.
Sigma-Aldrich - The life-sciences company gained after Germany's Merck said it would acquire the company for $17 billion in cash.
Tekmira Pharmaceuticals - The drug maker rose after U.S. and Canadian regulators authorized the use of its Ebola treatment in those with confirmed or suspected infections from the deadly virus.
Tesla Motors - The electric-car maker moved lower on a cautious note from JPMorgan.
TriMas - The maker of engineered and applied products dropped after cutting its full-year earnings outlook.
Yahoo - The web-portal company fell after Bank of America Merrill Lynch and Sanford Bernstein downgraded its shares.
(See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.Questions? Comments? Email us at firstname.lastname@example.org