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NEW YORK ( TheStreet) -- Digital Generation ( DGIT), MannKind ( MNKD) and Windstream ( WIN) sank to 52-week lows on Thursday.

Digital Generation

The digital technology services company reported Wednesday first-quarter net income of $988,000, or 4 cents a share, down from year-earlier net income of $12.7 million, or 45 cents.

"Versus peers, we see DGIT shares trading at 4x-6x EBITDA, or $7-$17," Oppenheimer analysts wrote in a report Thursday. "Currently, we cannot justify a long-term fundamental thesis; however, the company might be attractive to a PE firm given its cash flow characteristics and strong industry position."

Shares of Digital Generation hit a 52-week low of $8.66 on Thursday. The stock's 52-week high of $36.67 was set one year ago.

Digital Generation trades at an estimated price-to-earnings ratio for next year of 5.21 times; the average for broadcast and entertainment companies is 13.47.

Five of the nine analysts who cover Digital Generation rated it buy. Three analysts gave the stock a hold rating and one rated it sell.

The stock has fallen 27.85% year to date.

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MannKind

The biopharmaceutical company reported Wednesday a first-quarter loss of $38.2 million, or 27 cents a share, narrower than a year-earlier loss of $41.5 million, or 34 cents.

"We maintain our UW rating on MNKD following the company's 1Q update post close," JPMorgan analysts wrote in a report Thursday. "The Phase 3 AFFINITY trials evaluating Afrezza for Type 1 and Type 2 diabetes are enrolling behind schedule, which could potentially extend the timelines for data readouts and further stretch the already limited cash reserves of the company."

Shares of MannKind hit a 52-week low Thursday of $1.92. The stock's 52-week high of $4.30 was set on June 27.

Five of the 11 analysts who cover MannKind rated it sell. Three analysts gave the stock a buy rating and another three rated it hold.

The stock has dropped 22.58% year to date.


Windstream

The communications company reported on Thursday first-quarter net income of $64.6 million, or 11 cents a share, up from year-earlier net income of $29.4 million, or 6 cents.

The company's first-quarter earnings fell short of analysts' expectations, which on average called for a profit of 14 cents a share.

Shares of Windstream hit a 52-week low of $9.42. The stock's 52-week high of $13.57 was set on May 20.

Windstream's forward P/E is 15.75; the average for fixed-line telecommunications companies is 32.53. For comparison, Virgin Media ( VMED) has a lower forward P/E of 8.76.

Thirteen of the 18 analysts who cover Windstream rated it hold. Four analysts gave the stock a buy rating and one rated it sell.

The stock has fallen 14.4% year to date.

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-- Written by Alexandra Zendrian

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