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.
It will be visible in Asia and Australia. There will also be a solar eclipses on September 1, 2016 that will be visible from Africa and parts of the Indian Ocean. A solar eclipse on February 26, 2017 will be visible from South America, Africa and Antarctica.