Adena Friedman, president and CEO of Nasdaq, speaks about "Maximizing Shareholder Value" at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.

Adena Friedman, president and CEO of Nasdaq, speaks about "Maximizing Shareholder Value" at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.

Nina Easton, Chair, Most Powerful Women (MPW) International and Co-chair, Global Forum, Fortune, Cathy Engelbert, chief executive officer at Deloitte, Marillyn Hewson, chairman, president and CEO of Lockheed Martin, Ivanka Trump, senior adviser to the president, speak at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017. Reuters/Joshua Roberts

Marillyn Hewson, chairman, president and CEO of Lockheed Martin, speaks at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.

Nina Easton, Chair, Most Powerful Women (MPW) International and Co-chair, Global Forum, Fortune, Cathy Engelbert, chief executive officer at Deloitte, Marillyn Hewson, chairman, president and CEO of Lockheed Martin, Ivanka Trump, senior adviser to the president, speak at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.

Cathy Engelbert, chief executive officer at Deloitte and Marillyn Hewson, chairman, president and CEO of Lockheed Martin, speak at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.

Cathy Smith, executive vice president and chief financial officer at Target, speaks about "Maximizing Shareholder Value" at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.

Cathy Engelbert, chief executive officer at Deloitte, Marillyn Hewson, chairman, president and CEO of Lockheed Martin, Ivanka Trump, senior adviser to the president, speak at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.

Cathy Smith, executive vice president and chief financial officer at Target, speaks about "Maximizing Shareholder Value" at the 2017 Fortune magazine’s “Most Powerful Women” summit in Washington, U.S., October 9, 2017.