I am trying to say that the market treats ongoing earnings for longer periods of time differently than it does earnings that will only last for a few years. The market has a tendency to accord much higher PE's to long-term earnings. For whatever reason, the market is willing to assume profitable reinvestment for steady long-term earnings. We see this frequently in drug companies that have a patent cliff in 2, 3, 4 years.
I am also suggesting that when earnings come in very quickly, in huge amounts, that the reinvestment risk is greater. That will also result in a lower PE. The way to avoid that is to convince the marketplace and analysts that those funds can be reinvested profitably.
GILD played the buy-back card. The inference that I draw, is that there is no near-term M&A, and that the existing pipeline does not need the funds.
It is astonishing what foolish things one can temporarily believe if one thinks too long alone ... where it is often impossible to bring one's ideas to a conclusive test either formal or experimental. J.M. Keynes