The document discusses a simple but effective portfolio strategy of buying favor stocks and shorting out-of-favor stocks. It focuses on using both fundamental and technical analysis, with more emphasis on technical analysis for shorter investment periods. As an example, the document discusses investing in Nokia by going long while shorting Apple in late 2012. This was based on Apple introducing a disappointing new iPhone 5 after Steve Jobs' passing and Nokia partnering with Microsoft's new Windows Phone operating system to better compete with iOS and Android. The trades proved profitable as Apple's stock dropped 40% in the next 6 months while Nokia increased 60% in the next 3 months.