Chart assignment

Charts to read and discuss

Read each chart, then answer its questions. Every chart shows its source and date; open it for a table of the numbers and the data to download.

  1. Who owns the US national debt?
  2. Where does US electricity come from?

Chart 1 of 2 · Federal budget

Who owns the US national debt?

The interactive chart needs JavaScript. The numbers are on the chart's page.

At the end of August 2026 the federal debt was $40.2 trillion. Other U.S. investors (banks, mutual funds, pension funds, state and local governments and people) held $18.5 trillion, 46%. Foreign investors held $9.33 trillion (23%), federal trust funds such as Social Security's held $7.76 trillion (19%), and the Federal Reserve $4.55 trillion (11%). Foreign holdings are Treasury's TIC estimate, partly at market value, and the U.S. share is what's left after the others, so the split is approximate.

Questions to discuss

  1. In one sentence of your own, what does this chart show?
  2. Find the biggest change or difference in the chart. What might explain it?
  3. Who collected these numbers, and how recent are they? What else would you want to know before drawing a conclusion?

Source: U.S. Treasury Fiscal Data, Debt to the Penny; U.S. Treasury, TIC Major Foreign Holders of Treasury Securities; Federal Reserve Bank of New York, SOMA Holdings (Treasury data public domain (U.S. government work). The SOMA Holdings data is subject to the Terms of Use posted at newyorkfed.org; the New York Fed is not responsible for publication.) · Data as of Aug 31, 2026

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Chart 2 of 2 · Energy

Where does US electricity come from?

The interactive chart needs JavaScript. The numbers are on the chart's page.

In 2025 natural gas made 40.8% of US electricity, followed by nuclear (17.7%) and coal (16.6%). Wind made 10.5% and solar 6.7%. Solar counts only utility-scale plants, not rooftop panels, and the 2025 figures are preliminary.

How to read this chart

Each bar is one energy source's share of all the electricity made in the U.S. in a year, so the bars add up to about 100%. The bars start at zero, so a bar twice as long means twice the share. Solar counts only large power plants, not panels on rooftops.

Questions to discuss

  1. Which source makes the most electricity? About how many times more than the smallest bar?
  2. Which of these sources burn fuel and which don't? What share of electricity comes from each group?
  3. Why might a chart of this kind look different in your state than for the whole country?

Source: U.S. Energy Information Administration, Monthly Energy Review (Table 7.2a) (Public domain (U.S. government work)) · Data as of Dec 31, 2025

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