Sector Rotation: When Valuation of Hot Sectors Cools

Introduction

Valuation multiples are not just company-specific; they move with sector-wide capital flows that rotate between industries based on economic cycles, policy shifts, technological disruption, and investor sentiment. Understanding these rotation dynamics is essential for interpreting trading comps, evaluating precedent transactions from different periods, and advising clients on M&A timing.

Sectors in Favor (Elevated Multiples)

Technology. IT was up approximately 25% in 2025, driven by the AI spending wave. Semiconductor and cloud infrastructure companies commanded the highest multiples in the market, with NVIDIA's valuation exceeding $3 trillion. However, growing concerns about AI spending sustainability and the gap between infrastructure investment and near-term revenue generation suggest the sector may be approaching the late stages of its expansion phase.

Aerospace and defense. The S&P Aerospace and Defense Select Industry Index rose 46% in 2025, driven by NATO defense spending increases following the Ukraine conflict and broader geopolitical tensions. EV/EBITDA multiples for A&D companies reached 16-18x, well above their historical 10-12x range.

Communication services. Led by Alphabet (up 64% in 2025) and Meta, the sector's outperformance was driven by AI investment and digital advertising growth.

Sectors Out of Favor (Depressed Multiples)

Energy. Trading at a 36% discount to the S&P 500 and a 57% discount to the technology sector, energy had the weakest EPS growth of all sectors in Q3 2025 (0.3% year-over-year). Oil and gas multiples of 4-7x reflect both commodity price uncertainty and ESG-driven capital reallocation away from fossil fuels.

Consumer discretionary. Elevated interest rates have pressured consumer spending, and retail companies with exposure to big-ticket purchases (home furnishings, electronics, automotive) have seen multiple compression.

Sector Rotation

The migration of investment capital from one sector to another, driven by changes in the economic cycle, interest rate environment, policy shifts, or technological disruption. Rotation causes valuation multiples to expand in the sectors receiving capital and compress in the sectors losing it, independent of changes in the underlying companies' fundamentals. For example, rising interest rates typically rotate capital from growth sectors (technology, whose value is in future cash flows) toward value sectors (financials, energy, whose value is in current earnings), compressing technology multiples and expanding financial multiples even if neither sector's earnings have changed.

Comps Are Sector-Cycle-Dependent

Trading comps reflect the current state of the sector rotation cycle, not permanent value. A technology company valued at 20x EV/EBITDA in a period when tech is in favor may trade at 12x when capital rotates away. The company's fundamentals have not changed; the market's willingness to allocate capital to the sector has. The analyst must recognize whether the current comps reflect a sector premium (which may revert) or a sustainable re-rating (which is permanent).

Precedent Transactions Span Different Sector Cycles

A precedent transaction from 2021 (when tech was at peak multiples) is not comparable to a deal in 2025 (when tech has partially corrected but is still elevated). The analyst must contextualize each precedent within the sector cycle that prevailed when it occurred. A deal at 25x EV/EBITDA during a sector's peak phase may overstate what the current market will pay.

M&A Timing Is Sector-Cycle Timing

The most value-creating M&A decisions are often sector-cycle decisions. Selling when your sector's multiples are elevated (at the peak of the rotation into your sector) maximizes the sale price. Buying when the target's sector is out of favor (at the trough of the rotation away from the sector) minimizes the entry price. This is conceptually simple but practically difficult because predicting rotation peaks and troughs is as challenging as timing any market.