The solar terms divide the year by the sun's position into 24 fifteen-day windows — from Start of Spring (Lichun) to Great Cold. For 2,000 years they governed planting, harvest, and trade. Because they are astronomical (not lunar), they are precise to the minute — our lab holds an astronomical ephemeris of all 24 terms from 1900 to 2100.
In market practice, solar terms act as decision gates: the window around a term change often coincides with volume shifts, trend breaks, or news clustering (seasonal earnings, policy cycles). We test each term as a potential inflection window — some terms historically cluster higher, some lower, per asset class.
You do not need to believe anything mystical to use the terms — they are simply fixed, astronomical, seasonality markers with a 2,000-year track record of organizing economic activity. Add them to your trading calendar as review points: check your thesis at each term boundary, not at your brokerage's convenience.
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