Investors generally love companies that provide stable, predictable returns, and these are part and parcel of businesses that can stand the test of time.

However, in a world of rapid business change and technological disruption, investors need to constantly monitor the companies they own to check for signs of business disruption, competitive threats or technological challenges.

The same attitude should be applied to any company within one’s portfolio, be they small companies or blue-chip companies. Even blue-chip companies are not immune to severe disruptions to their tried-and-tested business models and may suffer deteriorating fortunes if they do not stay nimble and adaptive.

Here are three blue-chip companies that may have seen their golden age pass, never to return.

Investors need to ask themselves if each of these companies has what it takes to evolve and look for other avenues of growth.

Disclaimer: This is not a sponsored post. Opinions expressed