Steven Pearlstein for WaPo, here:
[T]he corporations of the Standard & Poor’s 500-stock index spent $477 billion last year buying back their own shares, a 29 percent increase over 2012 and the most since the peak year of 2007. The idea behind buybacks is that they are a tax-advantaged way to return profits to shareholders by boosting the market price of their shares. Since the stock market tends to value companies by multiplying the profits per share times the number of shares, reducing the number of outstanding shares has the arithmetic effect of boosting the stock price. ...
Stock buybacks in the S&P 500 transformed what would have been an 80 percent rebound from the lows of 2009 into a 178 percent increase, according to a study by Fortuna Advisors.
It would be one thing if most of these stock buybacks were paid for out of the trillions of dollars in cash now sitting on corporate balance sheets. But as it happens, most of them have been paid for by near-record levels of corporate borrowing. Of the $3.4 trillion in additional debt taken on by nonfinancial corporations since 2009, nearly 87 percent has been sent off to shareholders in the form of dividends and stock buybacks, according to Paradarch Advisors. ...
The Federal Reserve has also played a big role in the buyout bonanza. Over the past five years, the Fed has pumped $3 trillion into the financial system, much of which remained there rather than making its way into the real economy. That’s made it easy for companies to use cheap borrowed money to buy back their stock, or that of other companies.
