Analysts are weighing in today on software stock Red Hat, Inc. (RHT - 49.73), regional lender Fifth Third Bancorp (FITB - 12.32), daily deals site Groupon Inc. (GRPN - 25.33), semiconductor specialist OmniVision Technologies, Inc. (OVTI - 14.49), and airline issue Southwest Airlines Co. (LUV - 8.42). Here's a quick roundup of today's upgrades and downgrades of note.

• First up, RHT is down 1.7% after a downgrade to "neutral" from "buy" at UBS. The brokerage firm isn't totally downbeat, though, as UBS also raised its price target to $54 from $50. As a result of today's downgrade, RHT is poised to end the session beneath its 10-day moving average -- but additional support from the security's 20-day trendline is just below.
• As for FITB, the shares have edged 0.6% higher so far, boosted by a new "buy" rating from UBS. Despite today's modest advance, FITB remains pinned below resistance at its 50-week moving average, which has kept a tight lid on the stock since late April. Year-to-date, the shares have shed 16.6% of their value.
• For the second day in a row, Wall Street newcomer GRPN scored a new "buy" rating -- with today's bullish note courtesy of Hudson Square Research. However, the shares have backpedaled 2.5% at last check, continuing their post-IPO slump.
• After slashing its revenue forecast on Monday, OVTI was targeted by a pair of bearish brokerage notes today. Wedbush downgraded the shares to "neutral" from "outperform," while Oppenheimer lowered its rating to "perform" from "outperform." However, after shedding 17.6% to start the week, OVTI has notched a 1.6% gain this morning. Unfortunately, there's plenty of room for more downgrades going forward; Zacks tallies eight "buy" or better ratings for the stock, along with just two "holds" and zero "sells."
• Finally, LUV is trading flat today, as traders seem relatively unmoved by downgrade to "underperform" from "peer perform" at Wolfe Trahan. The stock is clinging to tenuous support at its 50-day moving average, which just barely contained Monday's pullback. For 2011, LUV is sitting on a substantial loss of 35.1%.