The U.S. publishes its nuclear stockpile numbers each year, so the world has a sense of what it owns. China doesn't share its count, which is why the Pentagon does the math instead.
The latest math: more than 600 warheads now, with another 400 expected by 2030.
For scale, Russia sits at about 4,300 warheads and the U.S. holds roughly 3,700. China is years away from matching either, but it is the only major power adding warheads this fast.
Last September, China rolled out new nuclear missiles at a military parade. The headliner was the DF-5C, a land-based missile that state media says can hit any spot on the globe.
Analysts flagged one feature in particular. The system could fly over the South Pole, dodging the U.S. early warning radars set up in the Arctic.
The Defense Intelligence Agency expects China to field 60 of these missiles by 2035. That would give Beijing a steady backup strike from any angle.
The same parade also showed off air-launched and sea-launched nuclear weapons. It was the first time China put all three legs of a nuclear triad - land, sea, and air - on public display.
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Officially, China says it has a "lean and effective" nuclear force and a no-first-use policy. That means it would only fire nukes after another country fired first.
The latest white paper claims Beijing "never has and never will" race other nations on weapons spending. The build tells a very different story.
Three new silo fields in western China can house over 300 long-range missiles. That's a clear shift from the old setup, which used missiles moved around on trucks.
Tong Zhao, a senior fellow at the Carnegie Endowment for International Peace, told Newsweek that China sees little value in explaining its buildup to outsiders. The aim, he said, is sending a clear deterrent signal, not offering peace of mind.
The buildup is happening as China's defense budget grows at the slowest pace in four years. Xi Jinping told military lawmakers in March that every dollar needs to count.
The bigger question for markets is the U.S. response. A faster China buildup means more pressure on U.S. defense spending, missile defense contracts, and bases across the Indo-Pacific.
For Wall Street, that turns the China story from a one-off headline into a long-running line item. Those are the trades investors will be watching.
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