There have been a lot of talk about Uber Technologies recently, and for good reason. The company has raised a lot of venture capital and is valued at more than $70 billion. There are some different ways how investors can evaluate the level of interest in short-selling Uber Technologies stock. The "Short Interest Ratio" (SIR), used by investors to analyze short selling a stock, is an easy way to check on the health of the company's balance sheet, because it compares the value of the stock being sold to the total value of the stock outstanding. Using stock market trading...