01Philosophy
Great investing is mostly discipline: own a sensible mix, keep costs low, and don't let emotion move you off plan. The hard part is doing it consistently, forever.
Most investors underperform their own portfolios — not because they pick badly, but because they drift: they chase what's rising, sell what's falling, and let winners balloon until a single position dictates their fate. A disciplined process fixes this, but discipline is exhausting to maintain by hand.
Kestrel encodes that discipline into software. You choose a risk level; from there, an autonomous agent does what a good advisor would — construct a diversified target, hold to it, and rebalance methodically — without fatigue, fees that compound against you, or the temptation to time the market.
02The agentic advisor
An agentic advisor is an autonomous agent that manages a portfolio on your behalf under a fixed, transparent mandate. It is not a chatbot and not a signal service — it is a persistent process with a narrow, auditable job:
- Observe — continuously price every holding from cross-sourced market data.
- Compare — measure each position against its target weight.
- Act — when drift exceeds a set band, execute the trades that return the portfolio to target.
Because the mandate is rules-based, its behaviour is predictable and reviewable. The advisor can only rebalance among your approved holdings; it has no discretion to speculate, add leverage, or move assets out of your control. Every action maps to a rule you can read in this paper.
A tireless, rules-bound portfolio manager that watches your mix 24/7 and quietly keeps it on target — and can never do anything else.
03Asset universe
Kestrel invests exclusively in tokenized real-world securities issued via Backpack Securities — 1:1 tokenized US stocks, ETFs, and gold that trade 24/7 on Solana and settle in USD terms. This gives round-the-clock, programmatic access to blue-chip US markets with on-chain settlement.
The universe spans four building blocks, combined in different proportions across the four portfolios:
- Broad-market ETFs (e.g. S&P 500, Nasdaq-100, dividend) — low-cost diversified cores.
- Blue-chip equities (e.g. Apple, Microsoft, Nvidia, Berkshire) — quality large-caps.
- Growth & frontier names (e.g. SpaceX, Palantir, Robinhood) — higher-return, higher-volatility exposure.
- Ballast — gold as a hedge and Treasuries / cash for stability.
Every candidate must clear liquidity and integrity screens before it can enter a portfolio; names that fail screening are excluded, and the mix is capped so no single position can dominate.
04Portfolio construction
Kestrel offers four risk-laddered portfolios. Each has a fixed target allocation across stocks, gold, and cash — the anchor the advisor holds you to. Risk rises as the stock share rises and the cash ballast falls.
| Portfolio | Risk | Stocks | Gold | Cash |
|---|---|---|---|---|
| Roost | Conservative | 50% | — | 50% |
| Perch | Moderate | 70% | 5% | 25% |
| Soar | Growth | 85% | 5% | 10% |
| Apex | Aggressive | 90% | 10% | — |
Within the stock sleeve, weights are capped so a single pumped name can't come to define the portfolio, and diversified across sectors and factors. Gold is added from the Moderate tier upward as a hedge that tends to hold up when equities fall. Full holdings for each portfolio are published on the Portfolios page.
05Rebalancing
Rebalancing is the engine of the whole system. Kestrel uses a drift-band method rather than a fixed calendar: it rebalances only when a holding strays more than a set band from its target — roughly three percentage points — not on an arbitrary schedule.
Why bands beat the calendar
Calendar rebalancing trades whether or not it's needed — churning in quiet markets and often waiting too long in violent ones. Drift-bands are volatility-driven: they do nothing when markets are calm and act precisely when markets move enough to matter. Fewer needless trades, and a response that scales with what the market is actually doing.
The rebalancing premium
Systematically trimming what has run ahead and topping up what has fallen behind is a disciplined "sell-high, buy-low." Across choppy, trending, and crashing markets, this tends to add return versus simply holding the same basket untouched — and, just as importantly, keeps your risk from quietly creeping above the level you chose as winners balloon.
If growth names rally and push your stock share from 60% to 73%, your portfolio is now riskier than you signed up for. The advisor trims the excess back to 60% and restores the gold and cash — resetting both your risk and your discipline.
06Risk management
Risk is controlled at every layer of construction, not bolted on afterward:
- Diversification — every portfolio spreads across many names, sectors, and asset classes.
- Position caps — single-name weights are limited so no one holding can sink the portfolio.
- Ballast & hedges — Treasuries/cash and gold cushion drawdowns and dampen volatility.
- Drift control — rebalancing prevents risk from silently drifting above your chosen level.
- Screening — the inclusion screen fails closed: when in doubt, a name stays out.
Kestrel does not use leverage and does not short. Portfolios are long-only baskets of real, tokenized securities.
07Custody & security
Kestrel is non-custodial by design. Your assets remain in a wallet you control. The advisor is granted a narrow, program-enforced authority that lets it rebalance between your approved holdings only — it can never transfer assets to itself or to any third party.
- You hold the keys. Kestrel never takes custody and never asks for your seed phrase.
- Rebalance-only authority. The delegated permission is limited to whitelisted-asset swaps; withdrawals to the advisor are impossible by construction.
- Revocable. You can withdraw the advisor's authority at any time.
- Transparent execution. Every rebalance is an on-chain transaction you can audit.
This invariant — that the agent can act on your portfolio but never abscond with it — is the single most important property of the system, and the one we hold to the highest standard.
08Agent access (x402)
Kestrel is designed to be operated not only by people but by autonomous agents. It speaks x402 — an HTTP-native payment rail that lets software pay for a service per request, in stablecoins, with no account and no API key.
When an agent requests a paid action, Kestrel responds with HTTP 402, "Payment Required," describing the asset, amount, and recipient. The agent settles on-chain, retries with proof of payment, and Kestrel fulfils the request. This turns the advisor into infrastructure other agents can hire — a treasury bot or autonomous fund can open a managed portfolio, read allocations and NAV, and trigger a rebalance-check, entirely machine-to-machine.
Agent access inherits every guardrail of the core methodology: the granted authority is rebalance-only and non-custodial, weights stay capped, the universe stays screened, and each action is a discrete, metered, on-chain-auditable request. Full details are on the x402 page.
09Disclosures
This document is for information only. It is not investment advice, an offer, or a solicitation, and nothing here is a guarantee of future results. Figures and scenarios shown across the site are illustrative simulations, not forecasts. Tokenized securities carry market risk and additional risks specific to on-chain assets. Consider your own circumstances and seek professional advice before investing.