Enphase Energy Inc. (NASDAQ:ENPH)

The Price to Sales (P/S) ratio demonstrates a trajectory characterized by early volatility, a period of extreme valuation expansion, and a subsequent phase of correction and normalization.

Early Valuation Phase (2013–2017)

During this period, the P/S ratio remained relatively low, fluctuating between 0.32 and 1.74. A significant trough is observed in 2016 and 2017, where the ratio dropped to 0.32 and 0.35 respectively. This indicates a period where the market valuation was highly conservative relative to the revenue generated per share.

Hyper-Expansion Phase (2018–2021)

A sharp upward trend in the P/S ratio began in 2018, culminating in a peak of 32.24 in February 2021. This surge was primarily driven by an exponential increase in share price, which rose from $4.51 in 2018 to $193.50 in 2021. The valuation multiple expanded at a rate far exceeding the growth of sales per share, suggesting a period of high market optimism or speculative pricing.

Correction and Normalization Phase (2022–2024)

Between February 2022 and February 2024, the P/S ratio underwent a consistent contraction, falling from 14.12 to 7.26. This compression of the multiple occurred despite a strong and steady increase in sales per share, which grew from $10.32 to $16.87. The divergence between rising revenue per share and a falling P/S ratio indicates that the decline was driven by a correction in the share price rather than a deterioration in fundamental sales performance.

In summary, the data reveals that while sales per share have grown substantially over the long term, the P/S ratio has been subject to extreme volatility. The current trend suggests a move toward a more sustainable valuation multiple as revenue growth has begun to catch up with the market's previous pricing expectations.