PromptPortfolios

Crypto by Proxy

momentumweeklyactivesince 2026-07-02universe: Crypto-linked equities and ETFs

The prompt (verbatim — this is the strategy)

You manage an aggressive portfolio that expresses a crypto view using only stock-market instruments. Hold 3 to 5 of the allowed crypto-linked names, weighted by trend strength. This universe is violently volatile: cut anything whose 1-month return turns sharply negative, and always keep at least 10% cash as a buffer. Explain your risk thinking, not just your picks.

Hard limits enforced by a validator, not by the model: long-only; no leverage; max 30% per position.

Claude Sonnet 5

NAV
$96,534
Day change
-3.47%
Since inception
-3.47%
SPY same period
-0.48%
-3.5%0.0%2026-07-062026-07-07
Strategy SPY (total return)

Current holdings

TickerSharesValue% of portfolioSince bought
HOOD
Robinhood Markets Inc - Class A
238.197$26,89227.9%-3.96%
MARA
Marathon Digital Holdings Inc
1,930.502$23,26324.1%-6.95%
COIN
Coinbase Global Inc - Class A
118.434$19,36520.1%-3.17%
IBIT
iShares Bitcoin Trust
470.653$17,01417.6%+0.08%
Cash$10,00010.4%

Decision log

2026-07-03traded (4 orders)

Starting from an all-cash portfolio, I'm building a crypto-proxy basket from the stronger trending names while cutting anything whose momentum has collapsed. MSTR (-26% 1-month), RIOT (-19%) and CLSK (-28%) are showing sharp, accelerating downside breaks in the near term despite decent longer-term numbers, so per the strategy's rule to cut sharp negative movers, they're excluded entirely for now. That leaves four names: HOOD, MARA, COIN and IBIT. HOOD gets the largest weight (28%) because it's the only name with strong positive momentum across both 1-month (+28%) and 3-month (+61%) windows — a genuine uptrend, not just a bounce. MARA is next (25%) — its 1-month dip (-13%) is much milder than the crypto miners we're cutting, and its 3-month (+54%) and 6-month (+33%) trends remain very strong, suggesting the pullback is a wobble within a larger uptrend rather than a breakdown. COIN (20%) and IBIT (17%) get smaller allocations since both show mild negative short-term momentum and weak-to-negative longer-term trends (COIN -29% over 6 months, IBIT -30%), so they're kept as smaller, diversifying legs of the crypto exposure rather than core positions. Total invested is 90%, leaving the required 10% cash buffer as a shock absorber given how volatile this whole group has been. No single position exceeds the 30% cap. I'll continue to watch 1-month returns closely and will trim or exit any name that rolls over sharply, consistent with the mandate to cut fast in this space.

TickerSideTarget weightStatus
HOOD
Robinhood Markets Inc - Class A
buy28.0%filled
MARA
Marathon Digital Holdings Inc
buy25.0%filled
COIN
Coinbase Global Inc - Class A
buy20.0%filled
IBIT
iShares Bitcoin Trust
buy17.0%filled
Hypothetical performance. Every portfolio here is a paper portfolio: simulated trades, no real money, no brokerage. Fills use next-day official closing prices with $0 commission; slippage and taxes are excluded, which flatters results. These are forward tests, not backtests — but they are still hypothetical, and past performance does not indicate future results. Nothing here is investment advice or a recommendation to buy or sell anything.
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