COBYX Performance — The Cook & Bynum Fund
Data updated: 2026-08-25
COBYX returned +11.37% year to date and +16.06% over one year to Jun 2026. Over one year the fund trailed its Emerging Markets Equity category average: $100 grew to $116, against $141 for the category. Volatility over the past 12 months was 12.25% a year. In the 12 months to Jun 2026 the fund took in a net $2.7M, and assets reached $91.04M.
COBYX Growth of $100
What $100 invested in The Cook & Bynum Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Emerging Markets Equity category average over the same months.
| Period | COBYX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $116 | $141 |
| Since data start (Oct 2024 – Jun 2026) | $120 | $150 |
COBYX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +11.37% |
| 1 year | +16.06% |
COBYX Annual Returns
Calendar-year total returns of The Cook & Bynum Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +11.37% |
| 2025 | +20.51% |
| 2024 (Oct–Dec) | −10.60% |
COBYX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +3.4% | +5.6% | −5.6% | +4.0% | +3.5% | +0.4% | — | — | — | — | — | — |
| 2025 | +3.3% | +9.0% | +1.7% | +0.9% | +1.1% | −1.0% | −3.4% | +2.7% | +0.9% | −3.0% | +4.0% | +3.2% |
| 2024 | — | — | — | — | — | — | — | — | — | −4.7% | −3.4% | −2.9% |
COBYX Risk
Risk measures from monthly returns over Jul 2025 – Jun 2026.
- 1-year volatility (annualised): 12.25%
- Best month: +5.61% (Feb 2026)
- Worst month: −5.62% (Mar 2026)
COBYX Fund Flows
Monthly money in and out of The Cook & Bynum Fund, from SEC Form N-PORT.
- 12-month net flow: $2.7M
- 12-month gross sales (incl. reinvestments): $12.0M
- Sales ÷ redemptions: 1.30×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $894K | $491K | $404K |
| May 2026 | $583K | $728K | −$145K |
| Apr 2026 | $1.7M | $175K | $1.5M |
| Mar 2026 | $2.0M | $1.3M | $746K |
| Feb 2026 | $906K | $683K | $223K |
| Jan 2026 | $835K | $570K | $265K |
| Dec 2025 | $1.2M | $546K | $651K |
| Nov 2025 | $645K | $601K | $44K |
| Oct 2025 | $1.1M | $2.6M | −$1.6M |
| Sep 2025 | $659K | $316K | $343K |
| Aug 2025 | $785K | $802K | −$18K |
| Jul 2025 | $702K | $413K | $289K |
COBYX Assets Under Management
Net assets of The Cook & Bynum Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $91.04M |
| 2026-03-31 | $82.44M |
| 2025-12-31 | $78.80M |
| 2025-09-30 | $77.51M |
| 2025-06-30 | $76.77M |
| 2025-03-31 | $72.67M |
| 2024-12-31 | $63.38M |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.