Costco Wholesale Corp. (NASDAQ:COST)

The valuation multiples exhibit a distinct three-phase trajectory characterized by relative stability from 2021 to 2023, a significant expansion in 2024, and a subsequent gradual normalization through 2026. This synchronized movement across all measured ratios suggests a period of aggressive market re-rating in 2024 followed by a moderate correction in valuation premiums.

Price to Earnings (P/E) Ratio

The P/E ratio remained consistent between 36.38 and 39.79 during the first three years of the period. A sharp increase occurred in 2024, with the ratio peaking at 54.68. Following this peak, a steady decline is observed, reaching 45.26 by August 2026, although the final valuation remains substantially higher than the 2021-2023 baseline.

Price to Operating Profit (P/OP) Ratio

Mirroring the P/E trend, the P/OP ratio stayed within a narrow range of 27.28 to 30.86 until 2023. A significant spike to 43.38 was recorded in 2024. This was followed by a gradual descent to 39.05 in 2025 and 35.73 in 2026, indicating a cooling of the premium paid relative to operating performance.

Price to Sales (P/S) Ratio

The P/S ratio demonstrated minimal volatility between 2021 and 2023, fluctuating between 0.95 and 1.05. In 2024, a substantial expansion occurred as the ratio rose to 1.61. A moderating trend followed, with the ratio softening to 1.50 in 2025 and 1.40 in 2026.

Price to Book Value (P/BV) Ratio

A gradual decline in the P/BV ratio was evident from 2021 to 2023, moving from 11.30 to 9.99. This trend reversed sharply in 2024, with the ratio surging to 17.05. The subsequent two years show a consistent contraction, returning to 11.66 by August 2026, nearly aligning with the original 2021 levels.

The uniformity of the peaks across all four metrics in 2024 indicates a systemic increase in investor willingness to pay a premium for the equity during that period. The subsequent downward trend across all multiples suggests a transition toward a more sustainable valuation framework, although the ratios generally remain elevated compared to the 2021-2023 period.

Analysis of the valuation metrics indicates a period of significant share price appreciation coupled with consistent growth in earnings per share. While fundamental earnings have followed a steady upward trajectory, the valuation multiple experienced a period of rapid expansion before beginning a gradual contraction.

Earnings Per Share (EPS) Performance

A consistent upward trend is observed in EPS, which increased from 11.33 US$ in 2021 to 20.82 US$ by 2026. This steady progression reflects an ongoing improvement in the company's bottom-line profitability throughout the analyzed period.

Share Price Movement

The share price exhibited moderate growth between 2021 and 2023. A sharp acceleration occurred in 2024, with the price rising from 565.52 US$ to 909.10 US$. Following this surge, the price entered a phase of relative stabilization, reaching 942.25 US$ by 2026.

Price-to-Earnings (P/E) Ratio Trends

The P/E ratio remained relatively stable, fluctuating between 36.38 and 39.79 from 2021 through 2023. A significant valuation spike occurred in 2024, where the ratio peaked at 54.68, indicating that the share price appreciation outpaced earnings growth during that interval. A subsequent downward trend in the multiple is observed in 2025 and 2026, with the ratio compressing to 50.06 and 45.26, respectively, as earnings growth began to catch up with the market price.

The valuation analysis reveals a period of substantial share price appreciation and consistent growth in operational efficiency between 2021 and 2026. While operating profit per share grew steadily throughout the entire period, the price-to-operating profit (P/OP) ratio exhibited significant volatility, characterized by a sharp expansion in 2024 followed by a gradual contraction.

Share Price Performance

A strong upward trajectory is observed, with the share price increasing from 449.34 US$ in 2021 to 942.25 US$ by 2026. The most significant acceleration occurred between September 2023 and September 2024, where the price rose from 565.52 US$ to 909.10 US$, representing a substantial increase in market valuation within a single fiscal year.

Operating Profit Growth

Operating profit per share demonstrated consistent and linear growth, rising every year from 15.18 US$ in 2021 to 26.37 US$ in 2026. This steady increase indicates a sustained improvement in fundamental operational profitability, independent of market sentiment.

P/OP Ratio Dynamics

The P/OP ratio remained relatively stable between 2021 and 2023, fluctuating within a narrow range of 27.28 to 30.86. A sharp spike to 43.38 was recorded in 2024, indicating that the share price grew at a rate far exceeding the growth of operating profits, leading to a valuation premium. In the subsequent two years, the ratio moderated to 39.05 in 2025 and 35.73 in 2026, suggesting that operating profit growth began to align more closely with the elevated share price.

Overall, the data indicates that while the company successfully grew its underlying profitability, the market valuation experienced a period of aggressive expansion in 2024. The subsequent decline in the P/OP ratio through 2026 suggests a normalization of the multiple as operational gains caught up with the market's pricing.

An analysis of valuation metrics from August 2021 through August 2026 reveals a significant shift in the price-to-sales (P/S) relationship, characterized by a period of valuation expansion followed by a gradual stabilization.

Share Price and Revenue Performance

Share prices exhibited a consistent upward trajectory, rising from 449.34 US$ in August 2021 to 942.25 US$ by August 2026. A notable acceleration occurred between September 2023 and September 2024, during which the share price increased by approximately 60%. Parallel to this, sales per share demonstrated steady and uninterrupted growth, increasing from 434.68 US$ to 670.79 US$ over the analyzed period, indicating a consistent increase in the company's ability to generate revenue on a per-share basis.

Price-to-Sales (P/S) Ratio Trends

The P/S ratio remained relatively range-bound between August 2021 and September 2023, fluctuating between a low of 0.95 and a high of 1.05. This stability suggests that the market valuation was closely aligned with revenue growth during the initial three years. A sharp pivot occurred in September 2024, with the ratio spiking to 1.61. This increase indicates a valuation rerating, where the share price grew at a rate significantly outpacing the growth in sales per share.

Valuation Moderation

Following the peak in September 2024, a moderate downward trend in the P/S ratio is observed, declining to 1.50 in August 2025 and further to 1.40 in August 2026. This compression of the multiple occurs despite the continued increase in share price, suggesting that the growth in sales per share has begun to catch up with the market's valuation, leading to a more stabilized price-to-sales relationship.

The price-to-book value (P/BV) ratio exhibits a period of relative stability followed by a significant spike and a subsequent corrective trend. While the share price maintained a consistent upward trajectory throughout the period, the valuation multiple fluctuated based on the relationship between market pricing and the underlying book value per share.

Share Price Trajectory

A strong growth trend is evident in the share price, which increased from 449.34 US$ in August 2021 to 942.25 US$ by August 2026. The most aggressive expansion occurred between September 2023 and September 2024, where the price rose from 565.52 US$ to 909.10 US$, representing a substantial increase in market valuation within a single year.

Book Value per Share (BVPS) Progression

The BVPS generally demonstrated a positive trend, growing from 39.75 US$ in 2021 to 80.80 US$ in 2026. A notable anomaly occurred in September 2024, where the BVPS declined to 53.31 US$ from the previous year's 56.60 US$. Following this dip, the book value recovered sharply, increasing to 65.81 US$ in 2025 and 80.80 US$ in 2026.

Price to Book Value (P/BV) Ratio Analysis

The P/BV ratio initially trended downward, moving from 11.30 in 2021 to a period low of 9.99 in September 2023. However, a sharp reversal occurred in September 2024, with the ratio peaking at 17.05. This peak was the result of a dual effect: a significant surge in share price coinciding with a contraction in book value per share. In the subsequent two years, the ratio moderated to 13.90 in 2025 and 11.66 in 2026, returning toward historical norms as book value growth accelerated to keep pace with the share price.

The analysis indicates that while the market continues to assign a high premium to the company's book value, the valuation reached an extreme peak in 2024. The subsequent decline in the P/BV ratio through 2026 suggests a normalization process driven primarily by strengthening internal equity rather than a decline in market price.