Primary market prices are often set beforehand, while prices in the secondary market are determined by the basic forces of supply and demand. If the majority of investors believe a stock will increase in value and rush to buy it, the stock's price will typically rise.
The next good solar eclipse visible from Pennsylvania will be on 21st August 2017 when a large partial eclipse occurs (80% of the Sun's diameter obscured at maximum). This eclipse will be seen as total along a line from Oregon to South Carolina.
This total solar eclipse is fully visible in Charleston. This is a rare and spectacular event that can only be experienced along a relatively narrow strip on the Earth's surface. The eclipse is also visible in other areas, but the Moon does not cover the Sun completely there. More about the August 21, 2017 â Total Solar Eclipse.