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Shares of Cassava Sciences (NASDAQ: SAVA) were up 18.7% for the week, according to data provided by S&P Global Market Intelligence. The clinical-stage biotech stock closed at $22.32 last week, then

After a brutal sell-off last year that sent many of the best stocks into the bargain bin, some of the strongest are now on the rebound. Amazon (NASDAQ: AMZN) and Advanced Micro Devices (NASDAQ: AMD)

Sometimes, confirming investors' worst fears is enough to send a stock sharply lower, and that's exactly what we saw with shares of Topgolf Callaway (NYSE: MODG) this week. First-quarter earnings

Artificial intelligence lending company Upstart (NASDAQ: UPST) surged after releasing first-quarter earnings. It's a nice change of pace for investors who have watched the stock steadily plod lower

Shopify (NYSE: SHOP) has grown into a giant in the world of e-commerce software, but in the process, its operations became complex and hard for investors to decipher. However, soon, shareholders

Shares of Cytek Biosciences (NASDAQ: CTKB) were down 36.3% for the week as of Friday afternoon, according to data provided by S&P Global Market Intelligence. The healthcare stock closed at $11.92

Open Lending (NASDAQ: LPRO) had an excellent week, as its stock was up 29% as of 1 p.m. ET Friday, according to S&P Global Market Intelligence. The auto loan specialist's stock was trading at about

When NextEra Energy Partners (NYSE: NEP) stock tumbled in end-April, it was a head-scratcher. The company had just reported strong numbers, but it missed the consensus estimates, and that appeared

Chinese stocks struggled today as investors digested earnings results and remained concerned about economic conditions in the country.

Shares of large Chinese tech conglomerate Alibaba (NYSE: BABA)

The stock market had a tough session on Friday, as investors worried about the looming possibility of a U.S. government default on its sovereign debt. As of 2 p.m. ET, the Nasdaq Composite

Shares of Alphabet (NASDAQ: GOOG) popped more than 10% this week, according to data from S&P Global Market Intelligence. The parent company of Google, YouTube, and Google Cloud rose after its annual

Shares of Duolingo (NASDAQ: DUOL) soared as much as 17.4% this week, according to data from S&P Global Market Intelligence. The language-learning application posted strong growth across all its key

Week to date, shares of Under Armour (NYSE: UA) (NYSE: UAA) were down 11.5% through Thursday's close, according to data provided by S&P Global Market Intelligence. The sportswear brand delivered

Plug Power (NASDAQ: PLUG) plunged this week, trading 19.4% lower as of noon Friday, according to data provided by S&P Global Market Intelligence.

If you look at the hydrogen stock's price

Week to date, shares of Hain Celestial Group (NASDAQ: HAIN) were down 17% as of Friday morning, according to data provided by S&P Global Market Intelligence. Investors were disappointed with the

Shares of Harrow Health (NASDAQ: HROW) were down more than 24% as of 1:45 p.m. ET Friday after the company reported first-quarter earnings following the close of trading Thursday. The pharmaceutical

Week to date, shares of Sonos (NASDAQ: SONO) were down 27% through Friday morning, according to data provided by S&P Global Market Intelligence. The last year has been challenging for this leading

Shares of Amplitude (NASDAQ: AMPL) were sliding this week after the cloud-based software stock focused on digital optimization posted disappointing results in its first-quarter earnings report and

Fool.com contributor and finance professor Parkev Tatevosian shares his thoughts on how Palantir (NYSE: PLTR) uses artificial intelligence to beat the competition.

*Stock prices used were the

Shares of energy-drink maker Celsius Holdings (NASDAQ: CELH) are spiking nearly 30% this week, according to data provided by S&P Global Market Intelligence. The massive move brought the stock to an

Shares of Medical Properties Trust (NYSE: MPW) had declined by over 10% by 11:30 a.m. ET on Friday. Weighing on the healthcare REIT was a report in the Wall Street Journal regarding its top two

In this podcast, Motley Fool Chief Investment Officer Andy Cross and senior analyst Ron Gross discuss:

To catch full episodes of all The Motley Fool's free podcasts, check out our podcast center. To

Upstart (NASDAQ: UPST) saw its stock price surge 21.1% higher this week, as of Friday at 10:40 a.m. ET, according to S&P Global Market Intelligence. It had been up as much as 28.5% this week. The

It's been a relatively uneventful few days for the S&P 500 overall. Since the end of trading last Friday, the index has fallen less than 0.1%. Precious metals stocks, on the other hand, have