NEW YORK (TheStreet) -- Extreme Networks (EXTR) - Get Report gained 7.9% Monday to close at $3.56 after analysts issued upgrades last week, according to MarketBeat

DA Davidson boosted its price target to $3.50 on Friday, MarketBeat data show, and Wunderlich changed its rating to buy from hold on Thursday.

Adding to the positive sentiment, the company’s Wi-Fi was successfully deployed Sunday at New York’s Ralph Wilson Stadium, where the Buffalo Bills football team beat the Indianapolis Colts in the season opener. It’s the ninth NFL stadium to have chosen Extreme Networks gear for fan-facing Wi-Fi, showing that the company’s preferred supplier deal with the league is working well, according to the Mobile Sports Report Web site.

RealNetworks (RNWK) - Get Report fell 9.6% to $4.23, reversing last week’s gains. Zacks Investment Research encouraged investors Monday to keep a close eye on the stock after Friday’s “encouraging” price action.

The Seattle-based company creates applications and services for digital media. In 1995, RealNetworks introduced the Internet’s first audio streaming service.

Frontier (FTR) - Get Report declined 1.9% to $5.22 Monday, following the communications company’s pricing on Friday of a $6.6 billion private offering of senior notes.

Frontier plans to use the proceeds of the offering to help finance its acquisition of Verizon (VZ) - Get Report assets. That purchase comes with “substantial” long-term costs, according to a Motley Fool report Monday.

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