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.
A total lunar eclipse will be visible before dawn. All or part of it will be visible across the United States. Sept. 27: Total Lunar Eclipse The entire eclipse will be visible across the eastern half of the United States; from the rest of the country, it will be under way as the Moon climbs into view.