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.
The next total solar eclipse visible in the United States will be on August 21, 2017, but the path of totality will miss - just barely! - Indiana. The path of totality will pass about 40 miles south of the southern tip of Indiana; Evansville, IN will have a partial eclipse at 99% totality. Fortunately, you won't have to wait TOO long; a total solar eclipse will darken the skies across a swath of central Indiana including Indianapolis on April 8, 2024.