William Blair downgraded Aehr Test Systems to Market Perform from Outperform. Published first on TheFly – the ultimate source for real-time, market-moving breaking financial news. Try Now>> See the top stocks recommended by analysts >> Read More on AEHR: Aehr announces shipment of FOX-XP System to silicon photonics customer Aehr Test Systems receives $23M in follow-on orders Aehr Test Systems call volume above normal and directionally bullish