This column highlights the most useful and interesting business and financial commentary on technology every day.    TechCrunch Link: Facebook Stock Price Up 10.3% on the Day as Biggest Lockup Expires Irrational Changes Are Over “Facebook (NASDAQ:FB) share prices are up today with shares at 21.91 10.32% above yesterday’s level. It represents a 4.6 billion market capitalization gain. Today the company is experiencing its biggest stock-lockup expiration with 773 million Facebook shares held by employees now eligible to be sold on the open market. Notably 504 million shares held by Mark Zuckerberg are eligible but he declared that he ...