Microsoft Corp. (NASDAQ:MSFT)

The valuation ratios exhibit a cyclical pattern characterized by an initial contraction phase, a period of significant expansion, and a subsequent sharp correction followed by a partial recovery.

Price to Earnings (P/E) Ratio

The P/E ratio began at 34.30 in September 2021, experiencing a gradual decline to a low of 26.71 by December 2022. A sustained expansion followed, with the ratio reaching a peak of 38.37 in September 2025. This peak was followed by a rapid compression in the first half of 2026, hitting a period low of 21.68 in June 2026, before recovering to 27.65 by September 2026.

Price to Operating Profit (P/OP) Ratio

The P/OP ratio closely mirrors the P/E trend, starting at 31.35 and descending to 21.76 by December 2022. It climbed back to a high of 29.68 in June 2025. A significant downturn occurred in early 2026, with the ratio bottoming out at 18.68 in June 2026, subsequently rising to 24.16 by the end of the observed period.

Price to Sales (P/S) Ratio

A contraction is observed from September 2021 (13.21) to December 2022 (8.83). The ratio then entered an upward trajectory, peaking at 13.70 in September 2025. Similar to the earnings and profit multiples, the P/S ratio saw a sharp decline to 8.74 in June 2026, before ending at 11.38 in September 2026.

Price to Book Value (P/BV) Ratio

The P/BV ratio demonstrates a more pronounced long-term downward trend compared to the other multiples. From a high of 15.32 in September 2021, the ratio fluctuated but generally trended lower, reaching a significant low of 6.56 in June 2026. The period ended with a moderate recovery to 8.38 in September 2026.

Overall, the data indicates a period of high valuation premiums peaking in mid-to-late 2025 across all metrics, followed by a systemic correction in the first half of 2026. The consistent alignment across P/E, P/OP, and P/S suggests that market sentiment and valuation shifts were driven by broader price movements rather than isolated changes in a single financial metric.

The financial data exhibits a consistent upward trajectory in earnings per share (EPS), contrasted by periodic volatility in share price and corresponding fluctuations in the price-to-earnings (P/E) ratio. While earnings growth remained steady, market valuation shifted through distinct phases of compression and expansion over the analyzed period.

Earnings per share (EPS) growth

A sustained and linear increase in EPS is evident, rising from 9.04 US$ in September 2021 to 19.21 US$ by September 2026. This represents a steady growth in profitability that persisted regardless of fluctuations in the equity's market price.

Share price volatility

The share price experienced an initial downward trend, reaching a period low of 242.04 US$ in December 2022. This was followed by a significant recovery and growth phase, peaking at 541.55 US$ in September 2025. The final quarters of the period show increased volatility, ending at 531.01 US$ in September 2026.

P/E ratio fluctuations

The P/E ratio demonstrates three primary movements. An initial compression phase occurred between September 2021 and December 2022, where the ratio declined from 34.30 to 26.71. An expansion phase followed, with the ratio climbing to a peak of 38.37 by September 2025. A sharp contraction is observed in the first half of 2026, with the ratio dropping to a period low of 21.68 in June 2026, before recovering to 27.65 by September 2026.

Valuation correlation

The divergence between the steadily increasing EPS and the fluctuating P/E ratio suggests that the share price was driven more by changes in market sentiment and valuation multiples than by earnings performance alone, particularly during the peaks of 2025 and the correction in 2026.

An analysis of the valuation metrics from September 2021 through September 2026 reveals a divergence between consistent operational growth and fluctuating market valuation. While operating profit per share maintained a steady upward trajectory throughout the entire period, the share price exhibited significant volatility, resulting in a variable Price to Operating Profit (P/OP) ratio.

Share Price Volatility

The share price experienced an initial contraction from $310.11 in September 2021 to a low of $242.04 by December 2022. This was followed by a prolonged recovery and expansion phase, peaking at $541.55 in September 2025. A subsequent sharp decline occurred between December 2025 and June 2026, with the price dropping to $390.54, before a final recovery to $531.01 in September 2026.

Operating Profit Expansion

Operating profit per share demonstrated a consistent and uninterrupted increase across all twenty-two quarters. Starting at $9.89 in September 2021, the value grew monotonically to reach $21.98 by September 2026. This linear growth suggests a strong and stable improvement in operational performance regardless of the external market volatility affecting the share price.

Price to Operating Profit (P/OP) Dynamics

The P/OP ratio reflects the interplay between market sentiment and operational reality. The ratio began at 31.35 and trended downward to 21.76 by December 2022, indicating a period where share price declines outpaced profit growth. A secondary peak of 30.20 was reached in December 2023, driven by a rapid increase in share price. The most significant valuation compression occurred in the final stages of the period, with the ratio hitting a minimum of 18.68 in June 2026, before adjusting to 24.16 in the final quarter.

Overall, the data indicates that while the market valuation (share price) has been subject to cyclical swings, the underlying operational profitability has grown steadily. The decline in the P/OP ratio toward the end of the observed period, despite the final price rebound, is primarily attributable to the significant increase in operating profit per share, which has effectively lowered the multiple the market is paying for each dollar of operating profit.

The Price-to-Sales (P/S) ratio exhibited significant volatility between September 2021 and September 2026, characterized by periods of contraction, expansion, and subsequent fluctuation. While sales per share maintained a consistent upward trajectory, the P/S ratio was primarily driven by shifts in the share price, reflecting changes in market valuation regardless of steady revenue growth.

Revenue Performance per Share

A consistent and linear increase in sales per share is observed throughout the entire period. Starting at 23.48 US$ in September 2021, this figure rose steadily to 46.65 US$ by September 2026. This trend indicates robust organic growth in revenue generation on a per-share basis.

Initial Valuation Contraction (2021–2022)

The P/S ratio experienced a downward trend during the first year and a half, falling from 13.21 in September 2021 to a period low of 8.83 in December 2022. This decline coincided with a reduction in share price from 310.11 US$ to 242.04 US$, suggesting a market-led compression of the valuation multiple.

Recovery and Expansion Phase (2023–2025)

A recovery in valuation occurred starting in March 2023, with the P/S ratio returning to double digits. The ratio climbed to 13.34 by December 2023 and reached a peak of 13.70 in September 2025. This expansion was driven by a significant increase in share price, which peaked at 541.55 US$ during the same month.

Recent Volatility and Divergence (2025–2026)

A notable divergence is observed between the late 2025 and mid-2026 periods. Despite sales per share continuing to grow, the P/S ratio dropped sharply to 8.74 by June 2026. This represents the lowest valuation multiple in the analyzed period, occurring despite the highest recorded sales per share. A partial recovery to 11.38 was observed by September 2026.

Summary of Valuation Drivers

The analysis indicates that the P/S ratio was not driven by revenue fluctuations, as sales per share grew monotonically. Instead, the ratio's volatility is attributed entirely to share price movements, suggesting that market sentiment and external valuation factors were the primary drivers of the P/S ratio's fluctuations.

The valuation profile exhibits a sustained contraction in the Price to Book Value (P/BV) ratio over the observed period, descending from a peak of 15.32 in September 2021 to 8.38 by September 2026. This overall trend indicates that the growth in the underlying book value per share has outpaced the growth in the market price of the stock over the long term.

Share Price Dynamics

The share price demonstrated significant volatility throughout the period. An initial decline was observed from 310.11 in September 2021 to a trough of 242.04 in December 2022. This was followed by a strong recovery and growth phase, with the price reaching a peak of 541.55 in September 2025, before concluding the period at 531.01 in September 2026.

Book Value per Share (BVPS) Growth

A consistent and linear upward trajectory is evident in the book value per share. Starting at 20.24 in September 2021, the BVPS increased in every consecutive quarter reported, eventually reaching 63.36 by September 2026. This steady accumulation of book value provided a stabilizing effect on the valuation ratio despite market price fluctuations.

P/BV Ratio Analysis

The P/BV ratio experienced a multi-stage decline. The first contraction occurred between September 2021 and December 2022, where the ratio fell from 15.32 to 9.84. A period of relative volatility followed, with the ratio fluctuating between a low of 9.13 in March 2025 and a high of 12.74 in December 2023. A final significant compression occurred in the first half of 2026, with the ratio hitting a period low of 6.56 in June 2026 before a moderate recovery to 8.38 in September 2026.