"The only comfort I get from it is that the interest is there but what perplexes me is why sell into potential good news?

Could it be that they want profit from earlier buys and do not want the price to drop too much because they want more to sell at these prices."

How about "weak hands" or daytraders? Some are simply so on the edge that it really takes close to nothing to make them sell. The daytraders probably think they know what they are doing. But at the end of the day, for every price there is a buyer and there is a seller. My price has not lit up yet on the screen :-)

Just my view, any other is probably more sophisticated.