UPDATE: Sterne Agee Upgrades Diodes to Buy on Improving Margins

Sterne Agee raised its rating on Diodes (NASDAQ: DIOD ) from Neutral to Buy and increased its price target from $13 to $22. Sterne Agee noted, "While DIOD has underperformed the Analog group with declining gross margins, we believe gross margins will bottom at current levels. Also flattish fab