On Wednesday, GT Solar priced it initial public offering at $16.50. This morning, it’s trading at 12.72, up from an intraday low of $9.30. I think this is a glass half-full / glass half-empty psychology test. The pessimists will wail about how much GT Solar fell in its market debut. The optimists smile and congratulate the selling stockholder for not leaving money on the table. I’ve added GT Solar International Inc. contracts to the site.