Verify, Don't Forecast

CONTENTS

The same moving-average line: why does one person see risk, another see opportunity, a third see nothing at all? The line hasn’t moved. The people have. The difference isn’t eyesight; it’s craft. Two crafts circulate in markets: forecasting and verification — they look alike and point in opposite directions.

Two crafts

Forecasting works like this: conclusion first, evidence second. Bulls collect good news, bears collect bad news; the verdict arrives before the materials. Verification runs the other way: fix the criteria first, then wait for the market to speak. There is a system that states this rule bluntly: don’t predict the market, verify it. Refuse to call tops and bottoms by judgment; wait for clear signals from moving averages, valuations, and fund flows, then act. Calling moves on tips and gut feeling is gambling, not investing.

That stings. The instinctive rebuttal: investing profits from prediction — know the turning point one step early, buy at the bottom, sell at the top; one step late leaves only scraps. Folklore is full of such stories, complete with beginnings and endings. What the stories omit: behind every legend of catching the exact bottom stand countless silent buys on the way down. Silence makes no stories, which is why the legends never seem to miss.

Verifiable criteria

The verifier holds no forecast, only rules written down in advance. What do they look like? Moving averages give direction, valuation gives range, fund flows give confirmation. Above the annual moving average, conditions are bullish — holding and adding are permitted. Below it, a long bear market’s main down-leg — positions contract sharply. This is not mysticism; it is a boundary set in advance. The Shanghai index’s 2,638 level in 2018 is one such historical dividing line: below the line, position discipline tightened — no exceptions.

Another rule concerns direction. Once bulls and bears have fought it out, the one-sided move becomes the path of least resistance: rising, good news gets amplified and bad news ignored; falling, the reverse. So no calling turning points early — wait for a confirmed break of the range, then follow. Notice the order: set the criteria first, then read the market, and the market’s word is final. Forecasting reverses it — read the market first, reach a conclusion, then gather only the evidence that favors it.

The Cost of Being Late

The strongest objection to this system: acting only on signals means always arriving late. By the time a breakout is confirmed, part of the rally is gone. Verification’s returns are structurally trimmed at the head, while a correct forecaster captures the whole arc. This bill is real. The cost must be admitted; there is no dodging it.

But the ledger must be complete. Whether a forecast is right is unknowable in advance — the same judgment can be right once and wrong the next; it cannot be written into a rule. A verification standard can be fixed in advance, and only what is fixed can be executed, and only what is executed can be reviewed. The trimmed head is the premium paid for “not blowing up.” What this system wins is not any single level; it is the absence of fatal errors. What the trimmed head buys is this: every error stays small, and every survival is intact.

Between knowing and doing

One more objection: everyone can see the signals. Who doesn’t know about a moving-average breakout? Where is the edge? The question lands in the right place, but the answer isn’t an information edge. Of course the breakout is easy to understand. The hard part is whether the hand actually contracts when the trend turns bearish; whether there is still the nerve to add on the pullback after the breakout. Between knowing and doing sits emotion — and in front of it, everyone believes they are the exception. This system never gambled on information asymmetry; it gambles on discipline.

Draw the boundary too: no indicator tutorials, no view on today’s levels, no stock picks. As for which side of the annual line the market sits on right now, this article gives no answer — what it offers is a method, not the answer. The market accepts no debate, only verification. Quit the urge to forecast, and whatever actions remain become reliable.

Fengyu WANG
Fengyu WANG

Markets, investing, engineering — one person, one underlying logic.