# MEMORANDUM

**TO:** Investment Committee / Venture Capital Partners
**FROM:** Quantitative Strategies
**DATE:** October 22, 2026
**SUBJECT:** One-Pager Thesis: Retail Precious-Metals Arbitrage & Rewards-Stacking via Big-Box Channels

> *A straight-faced analysis, written earlier the same day I asked an office shopping agent to add a 1 oz gold bar to the Seattle Costco basket. See the accompanying post: [I Asked a Shopping Agent for Costco Gold Bars](https://jasonburt.page/blog/i-asked-a-shopping-agent-for-costco-gold-bars/).*

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## Executive Summary

This thesis investigates a quantitative retail arbitrage strategy: leveraging structural price-lag windows on Costco.com for 1 Troy Ounce 24k gold bars, combined with a 4% institutional/consumer rewards stack (Executive Membership + co-branded credit card).

While raw theoretical margins suggest a viable delta, state-level tax policy shifts completely alter the unit economics. Specifically, because Washington State repealed its precious metals sales tax exemption, any in-state execution is rendered net-negative. Consequently, the core strategic thesis hinges on jurisdictional arbitrage (executing operations via entities or shipping nodes in zero-tax jurisdictions like Oregon or Idaho).

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## 1. Core Economic Model & Unit Level (Per 1 Oz Bar)

- **Base Asset:** 1 Troy Oz PAMP Suisse / refined gold bar (~$4,000 spot baseline)
- **Costco Retail Price:** $4,080 (reflects a standard ~2% retail markup)
- **Rewards Stack (4%):**
  - Executive Membership Rebate: 2% ($81.60)
  - Costco Anywhere Visa Card Cash Back: 2% ($81.60)
  - Total Rewards Capture: **−$163.20**
- **Net Acquisition Cost: $3,916.80**

### The State Tax Variable (Washington vs. Non-Tax States)

- **Washington State (current law):** Washington assesses retail sales tax (~10.0% in King County) on precious metal bullion. Adding ~$408 in state tax instantly spikes the true cost to **$4,324.80**, locking in an immediate, unavoidable **−$380+ structural loss** upon secondary market liquidation. **Washington execution is a non-starter.**
- **Zero-tax jurisdictions (e.g., Oregon, Delaware, Montana):** zero state sales tax preserves the 4% reward discount, achieving a net entry price below spot ($3,916 vs. $4,000 live market).

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## 2. Monthly Operating Plan & Execution Schedule

To maximize capital efficiency under Costco's strict anti-bot and 24-hour quantity caps (typically capped at 1 to 2 units per membership per day):

- **Target Frequency:** 8 transactions per month (optimized around volatile macroeconomic data drops, e.g., CPI releases or FOMC announcements where retail pricing lags live spot movement by 4–12 hours).
- **Volume:** 2 units per purchase execution = 16 Troy Oz / month.
- **Capital Requirement:** ~$65,280 revolving float.

### Monthly P&L Projections (Zero-Tax State Baseline)

- **Gross acquisition outlay** (16 oz @ $4,080): $65,280
- **Rewards earned** (4%): **+$2,611.20**
- **Liquidation realization** (assuming average dealer buy-back at spot − 1.5%):
  - Spot value of 16 oz: $64,000
  - Dealer spread (1.5%): −$960
  - **Net cash realized: $63,040**
- **Net monthly return:**
  Net Cash ($63,040) + Rewards ($2,611.20) − Initial Outlay ($65,280) = **+$371.20 net profit / mo**

Note: margins are razor-thin (~0.5% to 0.8% net per turn) because wholesale dealer buy-backs absorb most of the rebate cushion unless a market bull run occurs mid-transit.

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## 3. Three-Year Projections & Scaling Limitations

| Metric | Year 1 | Year 2 | Year 3 |
|---|---|---|---|
| Annual Volume (Oz) | 192 oz (16 oz/mo) | 192 oz (16 oz/mo) | 192 oz (16 oz/mo) |
| Gross Turnover | $783,360 | $783,360 | $783,360 |
| Cumulative Rewards ($) | $31,334 | $31,334 | $31,334 |
| Net Arbitrage P&L | ~$4,454 | ~$4,454 | ~$4,454 |
| 3-Year Cumulative Net Profit | — | — | **~$13,362** |

### Why This Does Not Scale into a Venture-Backable Business

1. **The velocity bottleneck:** Costco's strict account limits and manual checkout triggers prevent automated bulk scaling. You cannot deploy institutional capital ($1M+) into this loop; accounts get flagged, canceled, or restricted.
2. **Rebate liquidity lag:** Executive rewards and credit card cash back are paid out annually, creating a significant working capital lockup relative to the absolute dollar return.
3. **Counterparty / liquidity risk:** Shipping physical gold introduces logistics risk, insurance premiums, and reliance on local coin/bullion shop bid spreads.

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## Investment Recommendation / Verdict

**Do not fund as a core VC thesis.** While a clever mathematical exploit of retail rewards structuring and pricing lags, the strategy functions merely as a high-effort, low-yield "side hustle" constrained by hard inventory caps and aggressive state tax code changes. For an institutional fund, the risk-adjusted return does not justify the operational overhead or capital lockup.