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5 Top Stock Gainers for Tuesday: Nvidia, FireEye and Weibo

Nvidia, FireEye, Weibo, PFSweb and Calix are five top stock gainers for Tuesday.

Stocks ended mixed Tuesday, with the Nasdaq closing at a record, as Wall Street came out of a long holiday weekend and oil prices turned lower. The drop followed a surge after talks among the world's largest oil producers broke down.

Here are some of the big movers in the stock market on Tuesday:

1. Nvidia | Increase 1%

Nvidia  (NVDA) - Get Free Report rose after another Wall Street analyst lifted his price target to near $1,000 amid expectations of continued strong demand for video graphics cards and related semiconductors that are used for both gaming and mining cryptocurrencies.

2. FireEye | Increase 4.3%

FireEye  (FEYE) - Get Free Report, along with other cybersecurity-focused companies, climbed after a weekend cyberattack on software provider Kaseya, in which Russian hackers demanded $70 million to restore data. 

Hundreds of companies were directly hit by the supply-chain attack on Kesaya's VSA software.

3. Weibo | Increase 6.3%

Weibo  (WB) - Get Free Report shares rose sharply after the chairman of China’s Twitter-like  (TWTR) - Get Free Report social-media company denied a report that he and a state investor were negotiating to take the company private.

The report came from Reuters, which cited sources.

4. PFSweb | Increase 43%

Shares of PFSweb  (PFSW) - Get Free Report soared after the commerce services company said it had agreed to sell LiveArea, its global customer experience and commerce agency business unit. The buyer is Merkle, a customer experience management company within Dentsu International. DNTUY

5. Calix | Increase 2.3%

Calix  (CALX) - Get Free Report advanced after the software company said it had signed a memorandum of understanding with RHI Magnesita of Vienna to develop a commercial-scale demonstration facility. 

The agreement covers development of a Calix Flash Calciner for use in producing refractory materials, which will enable CO2 separation for either use or storage.