Please use this thread to discuss your portfolio, learn of other stock tickers, and help out users by giving constructive criticism.
Why quarterly? Public companies report earnings quarterly; many investors take this as an opportunity to rebalance their portfolios. We highly recommend you do some reading: A list of relevant posts & book recommendations.
Be aware of Business Cycle Investing which Fidelity issues updates to the state of global business cycles every 1 to 3 months (note: Fidelity changes their links often, so search for it since their take on it is enlightening). Investopedia's take on the Business Cycle and their video.
Here's a list of all the previous portfolio stickies.