re "I believe it is inaccurate to attribute any clunker impact to the sales of the AC-seat car lines. Cars with AC-seats are upper end vehicles. Buyers did not trade in clunkers to buy AC-seat cars in great numbers"

I don't think those trading on the clunker news carried out that that type of analysis. It was a fast profit trade and don't be the last one out. They were trading any auto supplier that looked tradable and ARGN being a microcap gave them more bang for the buck. ARGN fell $2.28 or 26% from its $8.64 price on 8/4 down to $6.36 on 8/31 while the broad market was actually up over that time. the clunkers program reached it's rather sudden final end as they ran out of money and the heavy sell-off in ARGN occurred in those days when it became clear the program might end suddenly as they run out of money which is what happened on 8/24 which the rest fleeing the few days after it ended as it became clear it was not getting another reprieve. There was no company news except for news that was positive if anything about a partnership involving thermoelectric materials. The sharp rapid fall in the price reversed big gains that at least in part were due to the clunkers program going into effect and the anticipation of same. The facts and correlation are overwhelming and the fact it may have not have made good long term investment sense on a careful analysis was really beside the point.