Sonic ( SONC) downgraded at Goldman Sachs to Sell from Neutral based on valuation. Recent rally has pushed shares to levels that don't reflect increasing competition and negative margin impact of new $1 menu. Price target lowered to $10 from $11. Tibco ( TIBX) downgraded at Goldman Sachs to Neutral from Buy following recent rally. View shares as less attractive with only 8% upside potential to $7.50 price target. Whole Foods ( WFMI) downgraded at UBS. Rating lowered to Sell from Neutral. Price target raised to $13 from $12. Maintains 2009 EPS estimates of $0.73.