Sorry, Jack: The new business rules
Jack Welch's philosophy doesn't always reign. Four top CEOs reveal what it takes to run their companies in today's environment.
By Betsy Morris, Fortune senior writer

NEW YORK (Fortune) -- For two decades, the management philosophy of ex-GE CEO Jack Welch has been the holy grail of business practice.

Now, globalization, market volatility and the flood of new, disruptive technologies are forcing changes in both practice and mindset. Recently, Fortune talked to four influential CEO's, plus Jack Welch himself, about what's different about running a business today.

Their answers, about everything from the importance of market share to the role of shareholders, may surprise you.

For a photo gallery and their comments, click on the links below.

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Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer LIBOR Warning: Neither BBA Enterprises Limited, nor the BBA LIBOR Contributor Banks, nor Reuters, can be held liable for any irregularity or inaccuracy of BBA LIBOR. Disclaimer. Morningstar: © 2012 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2012 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2012. All rights reserved. Most stock quote data provided by BATS.