Trader, I know exactly what you're saying about the frustration of analysts' downgrades.
First, they often times seem to be based on some bare modicum of relevant data or are based on seemingly insignificant events.
Second, we all know that analysts more often get it wrong than right.
Third, the downgrades are often outright arbitrary, such as "the stock is approaching fair valuation based on our previous price target." Oh really?
Fourth, I suspect there are a lot of ulterior motives for downgrades. Paint me cynical, but I can literally imagine institutional firms calling in favors to have stocks 'downgraded' so as to force small block investors out of their positions and allow some hedge fund to consolidate its holdings.
I had a large position in Dow Chemical and began scaling out (foolishly) when Goldman Sachs 'downgraded' it when it was $36.50 last fall.