Solar polysilicon spot prices fell another 9% in October, estimates IHS iSuppli - that's the fastest rate of decline since February, and brings the total drop since that time to above 40%. Analyst Glenn Gu thinks a slight bounce will happen at the beginning of 2013, but still sees the overall supply/demand balance as unfavorable, and expects prices to start falling again later in the year. Polysilicon vendors MEMC (WFR +6.6%) and LDK (LDK +3.3%) rallied today, but 2012 still hasn't been kind to them.