Educational and non-advisory. Shishin publishes stock-signal research and is one of the two services compared here, we disclose that conflict openly and hold ourselves to the same tests. Nothing here is a recommendation to buy, sell, or subscribe to anything. Every Zacks figure below is the company’s own published claim as of mid-2026, not an independently audited fact; verify it at the source.
Zacks and Shishin are both quant, both rank stocks by rules rather than hunches, and both offer something for free. They differ on two things that decide trust: what the rank is built from, and whether its track record is something you can independently check. Here is the honest comparison, lineage and all.
The short version
The Zacks Rank is a genuinely respected signal with real academic roots, best used as an earnings-driven fundamental screen. If that is what you want, it earns its place. If what you want is a momentum and breakout board whose every call is committed in public before the outcome and can be replayed, that is the specific thing Shishin adds and a self-reported quant rank does not.
At a glance
| Dimension | Zacks | Shishin |
|---|---|---|
| The signal | Zacks Rank 1 to 5, driven heavily by earnings-estimate revisions | Daily momentum/breakout ranks, regime-routed across four engines |
| What it rewards | Analyst estimate momentum (a documented anomaly) | Price and volume behaviour, not estimates |
| Track record | Backtested, self-reported tier returns | Five-year backtest plus a live, externally attested record |
| Independently verifiable? | No external attestation | Yes, OpenTimestamps commit-reveal at /verify |
| Method legibility | Proprietary model (the exact formula is not disclosed) | Mechanical rules, described openly |
| Access | Free Zacks Rank; paid tiers escalate steeply | Free (delayed) board; paid from $20/mo |
| Best for | Earnings-driven fundamental screening | A rules-based board with a record you can audit |
Where Zacks genuinely wins
The Zacks Rank is not hype. It rests on one of the better-documented edges in the literature: stocks whose analyst earnings estimates are being revised upward tend to keep outperforming for a while. Zacks has been publishing since the 1970s, the free Rank is widely used and genuinely useful, and estimate-revision momentum is a real, distinct signal from anything Shishin measures. If you screen on fundamentals and earnings, the Rank belongs in your toolkit, and we do not replicate it.
Where they differ: the proof
1. Self-reported backtest vs an attested forward record
The eye-catching annualised returns Zacks cites for its premium tiers arebacktested and self-reported: the company computes them about its own product, and nothing external confirms the historical ranks were what they are shown to be. A backtest is a hypothesis, see why backtests lie. Shishin publishes a five-year backtest and anchors every day’s live signals to the Bitcoin blockchain via OpenTimestamps, so an outsider can confirm the calls existed, unchanged, on their date. Self-reported and independently attested are not the same evidence.
2. A proprietary model vs legible rules
The exact Zacks Rank formula is proprietary, you take the score on trust and cannot fully reason about why a name moved up or down. Shishin’s method is mechanical and described across this library: momentum and breakout rules, routed by a regime classifier. A rank you can reason about is one you can keep trusting when it is uncomfortable to.
3. Can you replay the history?
A track record only means something if the past calls are fixed and reproducible. Shishin never purges a published signal and the board equals the bot’s watchlist one-to-one, so there is no room for a selective memory to creep in. Demand the same replayability of any rank before you trust its headline number.
How to judge a quant rank
- Backtested or forward? Ask when the live record starts, and weigh only the forward part.
- Who confirms it? Self-reported is a claim; externally attested removes the “trust me.”
- Are the misses shown? A rank that markets its winners and quietly restates the rest tells you little, learn how to vet a track record.
Both the SEC and FINRA warn that services routinely advertise vague, cherry-picked, unverified past returns. The defense is the same for a 1970s quant house and a new one: demand the proof.
Which one fits you
- Choose Zacks if you screen on fundamentals and want an earnings-estimate-driven rank with decades of tenure behind it.
- Choose Shishin if you want a momentum/breakout board with an independently verifiable record, free to watch, with the misses shown and a method you can read.
- Our honest weakness: Shishin is new, a five-year backtest plus a still-short live record, against Zacks’ half-century. The trade is tenure and a different, complementary signal against verifiability and a legible method.
These two are not rivals so much as different tools: an estimate-revision rank and a momentum board answer different questions. The one thing we do that a self-reported rank does not is let you check the record yourself.
Sources & further reading
- Zacks Investment Research, Zacks Rank methodology, tiers, and performance materials, the company’s own published claims as of mid-2026. zacks.com
- FINRA, “Know the Risks of Auto-Trading Services Offered by Unregistered Entities.” finra.org
- U.S. SEC, Office of Investor Education and Advocacy, Investor Alerts & Bulletins. investor.gov
- Shishin, the public attestation log. shishin.io/verify. See also the full field compared.