NEW YORK, November 8, 2013 /PRNewswire/ --

Market Buzz Report, one of the leaders in providing daily penny stocks alert, issues critical research analysis for Twitter Inc(NYSE:TWTR), Vale SA (NYSE:VALE), OCZ Technology Group Inc.(NASDAQ:OCZ), Radian Group Inc(NYSE:RDN), Keryx Biopharmaceuticals(NASDAQ:KERX).

Though off its intraday high of $50.09 (achieved shortly after shares began trading), Twitter Inc(NYSE:TWTR) remains above its opening level of $45.10. 89M shares have been traded so far, after 70M were sold in the company's $1.82B IPO.

Is TWTR Still A Buy After The Stunning Debut? Get The Special Report Here http://marketbuzzreport.com/index.php?code=TWTR (Or Copy and paste the URL into your browser)

Twitter is staying strong even as Internet peers (many of which soared earlier this year) sell off, and Pivotal Research's Brian Wieser issues a two-notch downgrade to Sell, citing valuation; the firm has slightly lifted its PT to $30 from $29.Wieser: "One way to justify a $45 price in our model would involve presuming that Twitter could generate more than [$6 billion] in annual revenue by 2018 ... "However, we think that would seem overly optimistic to us given our best assessment of the industry and the business at this point in time."Six other firms still have bullish ratings on Twitter, but only two - Topeka and SunTrust - have PTs above Twitter's current trading price. With shares trading at over 45x 2013E sales after factoring options/RSUs, critiques of its valuation are easy to find today.

Vale SA (NYSE:VALE) says it is looking at ways to tie up its nickel operations in Canada's Sudbury basin with those of nearby producers such as Glencore Xstrata, likely taking the form of an "unincorporated" joint venture in the mining, milling and smelting segments of nickel production.

How Should Investors Trade VALE After The Recent Volatility? Find Out Here http://marketbuzzreport.com/index.php?code=VALE (Or Copy and paste the URL into your browser)

Vale says it has sought synergies in the Sudbury basin constantly since 2006 but stagnant nickel prices appear to have given new impetus to the effort; Barclays estimates nickel prices will average $15,173/ton this year, down from $22,853 in 2011.

After dropping 58% on Monday and Tuesday in the absence of any major news, OCZ Technology Group Inc.(NASDAQ:OCZ) has rallied 69% over the last two days. Altogether, shares remain down 29% from their Friday close, and 42% from where they traded before OCZ's Oct. 15 FQ2 report, within which the SSD vendor disclosed it ended its August quarter with only $10.6M in cash.

Free Urgent Insider Catalyst Report For OCZ Available Here: http://marketbuzzreport.com/index.php?code=OCZ (Or Copy and paste the URL into your browser)

This morning, OCZ unveiled its Vector 150 PC SSD line. The company asserts its use of 19nm NAND flash chips and its home-grown Barefoot 3 controller IC yields superior performance relative to prior-gen drives; reviews are generally positive. However, OCZ has carried out similar product launches in the past without seeing its shares move sharply afterwards PC Perspectives offers a positive review for the Vector 150 line, and generally praises their performance. The Tech Report also likes what it sees, but is hesitant to recommend the products after "watching negative user reviews stack up for two generations of Barefoot drives."

We "anticipate increased competition in our industry from new and existing mortgage insurance companies," says Radian Group Inc(NYSE:RDN) CEO S.A. Ibrahim. "Competitors recently reduced their borrower-paid mortgage insurance premiums by 5 basis points, which we promptly matched."Radian's Q3 resultsBacked by heavyweights Soros, Goldman, and JPMorgan, Essent Group (ESNT -0.6%) came public last week, while NMI Holdings - backed by Carlyle, Kyle Bass, and BlueMountain - also contemplates an IPO.

Free Urgent Insider Catalyst Report For RDN: Available Here: http://marketbuzzreport.com/index.php?code=RDN (Or Copy and paste the URL into your browser)

JPMorgan reiterates Keryx Biopharmaceuticals(NASDAQ:KERX) at Overweight on the strength of the latest Zerenex data (non-dialysis dependent chronic kidney disease patients with elevated serum phosphorus and iron deficiency anemia).

Is KERX a Solid Buy After The Recent Rally? Get Free Special Trend Analysis Here http://marketbuzzreport.com/index.php?code=KERX (Or Copy and paste the URL into your browser)

Here's analyst Cory Kasimov: "Based on the data and management's comments on the conference call, we are updating our model to 1) include a higher WAC at launch and 2) to include a NDD-CKD revenue model from an iron supplement perspective rather than a phosphate binder."Kasimov predicts approval (ESRD) next year. Price target raised to $22 from $14.

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