NEW YORK ( TheStreet) -- CHANGE IN RATINGSAthenaHealth ( ATHN) upgraded at Deutsche from Hold to Buy. Company has completed its accounting review and has a strong long-term growth outlook. $51 price target. BlackRock ( BLK) upgraded at Credit Suisse to Outperform from Neutral on valuation and expected stronger earnings. Price target lifted to $280. 2010 and 2011 EPS estimates raised to $11.36 and $13.50, respectively. Cummins ( CMI) upgraded at Sterne Agee from Neutral to Buy. $79 price target. Company had an upbeat analyst meeting and should begin returning more cash to investors. Citrix Systems ( CTXS) upgraded at Goldman from Sell to Neutral. Stock also removed from the Conviction List. Company will be a big winner from desktop virtualization. $52 price target. Diamond Offshore ( DO) downgraded at Credit Suisse to Underperform from Neutral on rising rig-on-rig competition. Price target reduced to $79 from $86. 2010 and 2011 EPS estimates lowered to $8.25 and $7.30, respectively. Jack in the Box ( JACK) upgraded at Goldman from Neutral to Buy. $27 price target. Estimates also raised, as margins are near a bottom.