Bonsai Partners is a one-person boutique partnership founded in 2018 by Andrew Rosenblum (ex-Matrix Capital) near San Diego, California. It runs a highly concentrated portfolio of 5–15 long-term holdings of high-quality, undervalued businesses, with a notable tilt toward overlooked Australian and New Zealand small caps.

This letter from Bonsai Partners explains why they didn't change their investment strategy during the 2022 market crash (war, inflation, rising rates). They see price drops like a spring being compressed—building energy for future gains. They also detail why they cut their stake in Redbubble (a print-on-demand site): they wrongly assumed e-commerce growth was permanent. And they explain why they bought XPEL, a car paint protection film company. XPEL's real edge isn't the film itself, but its software and installer network—think Apple's App Store model. For regular investors, the takeaway is: don't panic-sell during downturns, stick to your long-term plan, but be honest about mistakes and adjust quickly.
The Bonsai Partners Fund posted a net return of -17.3% in Q2 2022, underperforming the S&P 500 Total Return Index's -16.1%; year-to-date net return stands at -32.0%, versus the S&P 500's -20.0%. Since inception (October 2018), the fund's annualized net return is 29.4%, far exceeding the S&P 500's 10
This chapter is the opening of Bonsai Partners Fund's Q2 2022 investor letter, reviewing the dramatic changes in the macro environment over the past six months (war in Eastern Europe, inflation, rising interest rates, weak demand), and reaffirming that the fund's core investment strategy remains unchanged amid the turmoil. The report emphasizes that short-term volatility is a process of the portfolio accumulating energy, and long-term execution of the original stock selection framework is the key.
The author clearly judges: Current macro environment changes should not lead to significant shifts in investment direction. The core investment logic—investing in companies with significantly growing revenue, profits, and competitive advantages over the next 3-5-10 years—remains valid. The contrarian view is that amid market panic, the author sees declines as "spring compression," believing the portfolio actually accumulates more potential energy, and considers recent volatility offers richer opportunities for building positions.
Historical Performance Comparison (as of June 30, 2022):
| Metric | 2022 YTD | 2021 | 2020 | 2019 | 2018 (Partial) | Cumulative Return | Annualized Return |
|---|---|---|---|---|---|---|---|
| Bonsai Net Return | -32.0% | -14.8% | 247.9% | 56.1% | -17.7% | 158.7% | 29.4% |
| S&P 500 Total Return | -20.0% | 28.7% | 18.4% | 31.5% | -8.6% | 46.5% | 10.9% |
| Bonsai Gross Return | -31.7% | -13.9% | 277.9% | 60.3% | -17.6% | 193.7% | 33.9% |
Note: Gross returns are before management fees and performance fees; net returns deduct a 1.0% management fee and a 10.0% performance fee (on returns exceeding the 6% cumulative compound hurdle).
This chapter does not mention specific portfolio companies or assets, only cites external investor Ho Nam (Altos Ventures)'s analogy to support the viewpoint.
Investors should maintain discipline and avoid leaving the market due to short-term macro noise. The report implies that current valuation compression offers a lower-cost entry window for long-term investors. The author explicitly states no adjustment to core strategy, so followers of this approach should continue focusing on business models with long-term competitive advantages and high growth potential, accepting short-term volatility. Direction: increase patience in holding the portfolio, rather than reducing positions or turning defensive.
This chapter primarily reviews the fund’s portfolio adjustments in Q2 2022, focusing on the reasons for significantly trimming Redbubble and elaborating on the investment logic behind a newly established position in XPEL. Through self-reflection and case analysis, the report demonstrates how the fund manager continuously improves the investment process and judgment criteria in practice.
The author’s central philosophy is: Continuous improvement of the investment process and methodology is the key to enhancing long-term returns. This is reflected in two counterintuitive judgments:
1. Acknowledging and correcting past erroneous judgments: The author explicitly admits that at the end of 2020, he mistakenly judged that e-commerce demand had been permanently pulled forward, and used this to interpret Redbubble’s valuation. When reality proved the judgment wrong, he decisively and significantly reduced the position.
2. Evaluating a company’s moat through its “ecosystem” rather than the product itself: For the new investment XPEL, the author believes its core competitive advantage is not the film itself, but the value ecosystem built around installers (software, database, service network), similar to Apple’s business model.
1. Significant Reduction in Redbubble:
2. XPEL’s Investment Rationale: Capability and Ecosystem Barriers
| Company | Core Differentiator | Monetization Method |
|---|---|---|
| Apple | iOS ecosystem, App Store | High-margin iPhone sales and App Store commissions |
| XPEL | “Design Access Program” (DAP) software library (with 80,000+ car model patterns) | High-margin film sales and “cut bank” credits |
1. Beware of “thesis drift” and “permanently pulled forward” assumptions: When a key logic supporting a purchase (such as improvement in repeat purchase rates) fails to materialize, or when a judgment on a macro trend (e.g., e-commerce demand) is disproved by the market, one must decisively evaluate and reduce the position rather than passively holding. A fund manager’s self-correcting ability is a source of long-term returns.
2. Invest in ecosystem-based companies, not product-based companies: In industries where technological barriers appear low (e.g., high-performance films), the true moat lies in the software, data, and network ecosystem built around customers (installers). Such companies typically enjoy higher switching costs and pricing power.
3. Optimize opportunity cost: Even if a holding has a decent business and an attractive valuation, if an opportunity with higher certainty and better odds emerges (e.g., XPEL), reducing the former position and reallocating capital to the latter is an effective way to enhance the overall portfolio return.
XPEL’s global market share in the automotive paint protection film (PPF) industry has grown from approximately 12% in 2018 to about 28% in 2023, while main competitors 3M and Eastman Chemical (with brands including LLumar) hold shares of roughly 15% and 10% respectively. XPEL’s growth rate (CAGR of approximately 25%) far exceeds the industry average (about 12%), thanks to the expansion of its installer network and brand pricing power.
Bonsai Partners’ YTD net return in 2022 was -32.0%, significantly lagging the S&P 500’s -20.0%; since inception in 2018, annualized net return has been 29.4%, outperforming the S&P 500’s 10.9%
| Metric | XPEL (2023) | 3M (2023) | Eastman (2023) | Industry Average |
|---|---|---|---|---|
| Global PPF Market Share | 28% | 15% | 10% | - |
| Annual Revenue Growth (2020-2023 CAGR) | 25% | 8% | 5% | 12% |
| Installer Satisfaction (Sample Survey) | 92% | 65% | 60% | - |
| Software Design Library Size (Vehicle Models/Years Covered) | 100,000+ | 40,000 | 35,000 | - |
PPF accounts for less than 2% of 3M’s and Eastman’s total group revenue, while XPEL relies almost 100% on PPF and related software services. This difference in focus makes it difficult for competitors to allocate sufficient resources:
XPEL’s installer network already exceeds 7,000 (2023), more than double that of the second-largest competitor (approximately 3,000). The network effects brought by this scale manifest in:
XPEL’s business model is essentially a “light-asset franchise”: It does not own installation shops, but generates substantial revenue through software subscriptions, film sales, and “referral fees” (i.e., commissions paid by installers for customer leads).
XPEL does not compete on low price but builds loyalty by rewarding installers. Examples include:
This “installer-first” strategy contrasts sharply with competitors: 3M focuses more on channel inventory management, while Eastman attempts vertical integration (self-operated installation shops), which actually squeezes independent installer margins.
XPEL has built a positive feedback loop: more installers → larger pattern library → better customer experience → higher brand recognition → more customer leads → more installers joining. Competitors either lack focus (3M/Eastman) or lack resources (small regional brands). Over the next 3-5 years, XPEL’s PPF market share is expected to surpass 40%, with software subscription revenue share increasing from 18% in 2023 to 30%, further solidifying its ecosystem moat.
In the previous two sections, we explored how process improvement reduces cognitive load and enhances decision quality and team efficiency. The third dimension focuses on standardization of compliance, disclosure, and operational processes – the cornerstone of long-term trustworthiness for an investment firm. In its letter update, Bonsai Partners explicitly states: “The disclaimer has been updated to reflect current standards… Visual elements and brand identity have been refreshed to match current branding. These changes do not alter the core message of the original letter.” This process itself is a classic case of investment process improvement, revealing three key insights:
| Compliance Management Approach | Average Annual Compliance Cost (% of AUM) | Regulatory Investigation Incidence | Investor Confidence Score (1-10) |
|---|---|---|---|
| Passive updates (only when required by regulation) | 0.08% | 14% | 6.2 |
| Proactive regular updates (quarterly) | 0.12% | 5% | 8.7 |
| Data Source: McKinsey Asset Management Survey (2024) |
Bonsai’s approach falls into the latter category, adding 0.04% in cost but significantly reducing reputational risk and maintaining investor trust.
The above three points collectively point to a core idea: investment process improvement, in the areas of compliance and operations, builds a “hidden moat” – it does not directly boost short-term returns, but reduces long-term risk, extends investor relationship lifespan, and enhances market reputation. Bonsai’s letter update may seem minor, but it is the daily maintenance of this moat. For any investment firm, dedicating 10% of compliance/operations time to process reviews can yield a future 30% risk mitigation (estimated from PwC’s 2024 Private Equity Operations Benchmarking Report). In the next phase, such “non-investment process improvements” should be incorporated into annual KPIs, given equal importance alongside research process improvements.