Or maybe they have given millions to their daughter, Chelsea, although she has plenty of her own money, after working for years and marrying hedge fund manager Marc Mezvinsky in 2010. The problem with all of these ideas is they are merely guesses. The Clintons did not respond to repeated requests for comment. Others were just as perplexed as we were.“I don’t see how that would be possible,” said Jeff Mussatt, a certified financial planner who helped put together the financial disclosures for Republican presidential candidate Jim Gilmore. “That’s quite a mystery you have on your hands.”

What we do know is that when Bill Clinton ended his presidency, he and Hillary owed millions in legal fees and were essentially broke. On a financial disclosure document Hillary filed after entering the U.S. Senate in 2001, the Clintons declared assets of less than $1.8 million and liabilities of more than $2 million.

“We came out of the White House not only dead broke but indebt,” Hillary told Diane Sawyer on ABClast year. “We had no money when we got there, and we struggled to piece together the resources for mortgages for houses, for Chelsea’s education. You know it was not easy.”

Clinton later said she regretted the comment. If she and Bill were concerned about their finances leaving the White House, they didn’t act like it. In January 2001, they bought a $2.9 million house in Washington, DC, according to property records. Why worry? They had a business plan. Over the next 14 years Bill used his fame as a former President to book appearances all over the world, charging around $225,000 per performance (and sometimes much more). He made millions more writing books, working as an advisor to billionaire financier Ron Burkle and consulting for various businesses.

By the end of 2012 the Clintons had earned $174 million since leaving the White House. Yet in federal filings from April 2013 they claimed assets (excluding “personal use assets” like primary residences) of somewhere between $5.1 million and $25.4 million. That’s much lower than you would expect, even at the high end of that range.

No one knows where all of that money went. Hillary did loan her 2008 presidential campaign $13.2 million and never reported paying herself back, according to filings with the Federal Election Commission.

But the money never stopped flowing. In 2013, the power couple earned $27.5 million, more than the total compensation for CEOs at many of America’s largest corporations, including Apple, General Motors, and Wal-Mart. They followed that up with a record year in 2014, hauling in $28.3 million. Both the former president and the former secretary of state hit the speaking circuit as they geared up for another presidential campaign.