Corporate executives say optimistic things about their companies every day.

They appear on earnings calls, investor presentations and financial television programs to explain why the latest disappointing quarter is merely a temporary setback. They assure shareholders that the strategic plan remains on track. They remind everyone that the company has tremendous long-term opportunities.

Some of those executives may sincerely believe every word.

Others are simply doing what executives are paid to do.

Words are cheap. Stock is not.