NEW YORK (TheStreet) -- Tesla Motors (TSLA) - Get Report tanked Friday after two analysts reports cited concerns with the high-end electric vehicle maker. Storage maker EMC (EMC)  dropped sharply after Pacific Crest downgraded the stock. Hewlett-Packard (HPQ) - Get Report fell following a report that the technology giant faced larger legal costs after losing its appeal of a jury verdict. 

Tesla Motors plunged 2.8% to close at $185, on a day when the broader markets advanced.

Investors of the high-end electric vehicle maker apparently reacted to two analyst reports that issued concerns about the company. Research firm JL Warren Capital found the number of Tesla's Model S sedans that are registered in China plummeted 45% in February to 260 registrations, compared with January's 469. 

"We consider units shipped one of the measures of monthly incremental demand strength in the Model S," Junheng Li, head of research for JL Warren Capital, told Bloomberg, in its report. "The data suggest sharp weakening in the demand."

Meanwhile, an Argus analyst initiated coverage of Tesla with a hold. He cited concerns about the company's recent quarterly losses, the effect low gasoline prices will have on demand for the energy efficient cars and production shortfalls, according to a Barron'sreport.

EMC fell sharply by 2.5% to end the session at $25.17.

The storage maker retreated after Pacific Crest downgraded the stock to sector perform from outperform. In taking that action, Pacific Crest stated in a research note:

Weak storage field checks in a seasonally slow first quarter, coupled with an increasing appetite to consolidate, heighten near term execution risks for EMC. We are downgrading EMC and lowering our estimates due to increasing seasonal, secular and competitive risks

Pacific Crest also noted that EMC's sales representatives are "scrambling to close deals," reportsBenzinga.

Hewlett-Packard stumbled 1.6% to wrap up the day at $31.49.

The technology giant found it faced a larger legal bill after a Delaware Superior Court judge upheld a $6.5 million jury verdict and added an additional $1.5 million for legal costs and fees in a lawsuit brought by one of its former clients, according to a report Friday in Columbus Business First.

The former client, Professional Investigating and Consulting Agency, prevailed in its October trial in which is claimed HP misappropriated trade secrets and at a trade conference engaged in defaming the company, according to Columbus Business First. HP had sought to convince the judge to set a new trial and cut the size of the jury award.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.