The shares are rebounding this morning, with ATHN adding about 2% in pre-market trading.

FORBES: Athenahealth Rebounds on Analyst Upgrades; Put Sell Strategy in Focus

Oppenheimer also upgraded ATHN, lifting the stock to Market Perform, while Avondale Partners initiated coverage at Overweight.

FORBES: Athenahealth Rebounds on Analyst Upgrades; Put Sell Strategy in Focus

Athenahealth ( ATHN) is one, Quality Systems ( QSII), and Cerner ( CERN).

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Overall, the brokerage bunch is mostly bearish when it comes to ATHN.

FORBES: Athenahealth Rebounds on Analyst Upgrades; Put Sell Strategy in Focus

Many stocks, like Steven Madden Limited ( SHOO) or AthenaHealth ( ATHN), shown above, got hit with a reversal after breaking out on good earnings reports.

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Investors punished Athenahealth Inc. (ATHN) pretty severely on Thursday, after the provider of online health services forecast fiscal 2012 adjusted earnings of 87 cents to 97 cents per share at an investor meeting.

FORBES: Athenahealth Rebounds on Analyst Upgrades; Put Sell Strategy in Focus

Another name is Athenahealth ( ATHN).

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Among the largest underlying components of IWO, in trading today Alaska Air Group, Inc. ( NYSE: ALK) is up about 2.8%, Athenahealth Inc ( NASD: ATHN) is trading flat, and CommVault Systems Inc ( NASD: CVLT) is higher by about 1%.

FORBES: IWO, ALK, ATHN, CVLT: ETF Outflow Alert

Among the largest underlying components of IWO, in trading today Alaska Air Group, Inc. ( NYSE: ALK) is off about 0.2%, Athenahealth Inc ( NASD: ATHN) is off about 0.9%, and CommVault Systems Inc ( NASD: CVLT) is lower by about 0.5%.

FORBES: Noteworthy ETF Inflows: IWO, ALK, ATHN, CVLT