Long cycles, honestly told

What a long wave is

Nikolai Kondratiev described, in the 1920s, long swings in prices and output lasting roughly fifty to sixty years. Joseph Schumpeter folded the idea into his theory of innovation, and the “Kondratieff wave” entered the vocabulary: an expansion phase, a plateau, a contraction, a trough — then again. The attractive part is obvious: a framework in which history rhymes at a scale larger than one lifetime.

Zhou Jintao’s nested cycles

Zhou Jintao (1972–2016), chief economist at CITIC Jiantou, became the most quoted Chinese voice on long waves after his 2016 talk, Life is a Kondratieff wave. His framework nests four cycles:

• Kondratieff (~50–60 years) — the master cycle;
• Kuznets (~20 years) — real estate and construction;
• Juglar (~9–10 years) — capital expenditure;
• Kitchin (~3–4 years) — inventory.

From this he drew a claim that travelled far: a human life spans roughly two long waves, so the position of your birth within the cycle shapes the opportunities you will see. His published record is mixed — some calls landed, others did not, and after his death at 44 the word 康波 became more of a shared narrative than a replicable method.

What the evidence actually supports

• Modern data contain only two or three candidate long waves — too few for statistical confidence. Results move when you change how the trend is removed.
• Mainstream macroeconomics does not use long waves as a forecasting instrument; they survive mostly as historical narrative.
• Even granting that waves exist, dating the current phase in real time is the hard part: reasonable analysts disagree by a decade about where the same data sit.

Huangji Jingshi: the thirty-year chapter

Shao Yong (1011–1077), one of the Song-dynasty philosophers, built a cosmological chronology in the Huangji Jingshi. Its arithmetic is exact and easy to state:

1 元 = 12 会 = 360 运 = 4,320 世 = 129,600 years
1 会 = 10,800 years · 1 运 = 360 years · 1 世 = 30 years

Shao Yong used hexagrams to periodise history within this grid. It is a moral and cosmological chronology — not physics, and not a trading system. Modern attempts to read markets off it are later additions that the text itself does not support. The one element worth borrowing is the unit: thirty years — one chapter of a human life, which is exactly the scale at which a person can actually reflect.

What we take, and what we refuse

We take the layers: a day (your reading), a year (the annual map), a chapter of roughly thirty years. Three time scales, each one a legitimate unit of reflection.

We refuse the rest — deliberately and permanently. We do not tell you which wave we are in, we do not date a cycle’s low or high, we do not name an opportunity year, and we do not translate any of this into what to buy or when. A cycle clock sounds like description, but choosing the phase is a market call in disguise: it cannot be verified afterward, and it changes what people do.

What can be verified is your own record — what you decided, what you did, how the days felt. That is the only cycle this product will ever track.