Big Days Parsed. These big up days occurring during longer term market declines, i.e. bear markets, can start off fast or slow, on good news or bad, but then they gain ground as they day goes on. The situation is they come after substantial legs down in stock market prices and after traders have piled on their shorts and when optimists and traders are looking for a market bottom, usually coming after a burst of selling or capitulation which leads to a vacuum. Thus they occur because bearish players have to cover their shorts and after just a bit of buying, the market strength getsexaggerated and exacerbated. Thus stocks keep rising and rising all day long, as more and more shorts are forced to cover and thus we get a good day morphing into a grand day, in other words, a “flashy splashy” rally. Like yesterday.