SAVNG Research

What twenty years of filings actually show

We test our own signals in public, count each company once, grade against the right benchmark, and publish the misses and the corrections next to the hits. Every piece links to the backtest behind it and to the stocks it points at today.

69,413insider purchases tested
13,036company-years, equity-bond test
2006–2026eleven market regimes
19pieces published
3corrections published
How to read a piece. The claim is one sentence you can check. "How we tested it" names the data, the period, the unit and the benchmark, and gives the command that regenerates the number. The sector table says whether the finding holds in your sector or only in aggregate. "Where it applies today" is live: the market state, the sectors under pressure, and the stocks that meet the condition right now. Hypothetical, before costs, not advice.

What works

Tested on the full record, with the sector breakdown.

What works

Dividend yield: a modest, real edge — until it gets extreme

Ranking payers by their declared yield at each annual report, higher yield beat lower yield over the next year. Above roughly 8% the market is usually right that the dividend is at risk.

Sep 10, 2026Read →
What works

Price-to-book still sorts, across all sizes

The oldest value signal there is. Ranking non-financials by price-to-book each year, the cheapest fifth beat the most expensive fifth over the following twelve months in most years, with th…

Sep 10, 2026Read →
What works

Cheap small caps on book value: the widest spread in our data

Among non-financial companies under $2 billion, the fifth cheapest on price-to-book at each annual report beat the most expensive fifth by a wide margin over the next year — and by more in …

Sep 10, 2026Read →
What works Pre-registered

When an insider raises their stake by 30% or more during a sell-off

The size of the commitment matters. Buys that raised the insider's existing holding by at least 30% are the strongest single signal we have found, and the Industrials cell was pre-registere…

Software & IT services +22.1 ptsMedical devices +18.0 pts
Sep 10, 2026Read →
What works

Insider buying pays in sell-offs, not in calm markets

Copying every opportunistic insider purchase barely beats small caps when the market is calm. The same trades beat the market clearly when it is being sold off.

Medical devices +23.0 ptsOther +10.8 pts
Sep 10, 2026Read →
What works Pre-registered

Cluster buys: three insiders, one week

Three or more insiders buying in the same ten-day window is the most quoted insider signal. It works, but mainly in stress, and the bank version of it works only in a panic.

Tech hardware & semis +28.8 pts
Sep 10, 2026Read →
What works

Officer buys versus director buys

Named executives (CEO, CFO, president) buying their own stock carry a small, consistent edge in every market state. Directors carry more in stress and less in calm.

Sep 10, 2026Read →
What works

Ranking companies as equity bonds: the top fifth beats the bottom fifth by a wide margin

Treat each company as a bond whose coupon is its owner earnings, growing at a capped rate, and rank the universe by the ten-year return that implies. The top fifth beat the bottom fifth by …

Healthcare services +38.4 ptsConstruction +37.1 ptsMedical devices +10.7 pts
Sep 10, 2026Read →
What works

The equity-bond lens works for steady compounders, barely for growers

Split by growth type, the ranking sorts steady names cleanly and moderate growers well. For fast growers the ten-year return leans on the growth assumption, and the lens loses most of its p…

Healthcare services +38.4 ptsConstruction +37.1 ptsMedical devices +10.7 pts
Sep 10, 2026Read →

What does not work

Negative results, published with the same care.

What does not work

Net-nets: the ratio does not sort, and the strict rule is a lottery

Ranking companies by net current asset value over price barely separates winners from losers. The strict Graham rule (price below net current assets) did return a high average, but on fewer…

Sep 10, 2026Read →
What does not work

Big dollar buys are the weakest insider signal we track

A $250,000-plus purchase sounds decisive. Across 9,000 of them it produced no edge in calm markets and a modest one in stress. Dollar size measures the insider's wealth, not their informati…

Sep 10, 2026Read →
What does not work Pre-registered

A first-ever insider purchase is not a signal in calm markets

We pre-registered the idea that a brand-new insider position in retail during a calm market would be informative. It was not. First purchases only matter when the market is already frighten…

Sep 10, 2026Read →
What does not work

Insider buying does not tell you a company will survive

Across the 20-year corpus, 93.4% of companies that later went bankrupt had a qualifying opportunistic insider buy in their final twelve months. So did the survivors. Insider purchases say n…

Sep 10, 2026Read →
What does not work

A 20%+ owner-earnings yield is the market disagreeing with the coupon

The richest-looking rows in the equity-bond table are almost never bargains. A yield above roughly 20% means the market expects the cash flow to shrink: a commodity peak, a business in run-…

Healthcare services +38.4 ptsConstruction +37.1 ptsMedical devices +10.7 pts
Sep 10, 2026Read →

Corrections

Where our own numbers were wrong, what caused it, and what changed.

Evidence pages

The full tables behind the findings.