# S&P Earnings Overstated by AI Depreciation Shifts

> AI capex deferrals inflate S&P 500 earnings by $854B, pushing valuation into bubble territory.
- Title: S&P Earnings Overstated by AI Depreciation Shifts | Shortify
- Summary: AI capex deferrals inflate S&P 500 earnings by $854B, pushing valuation into bubble territory. S&P 500 earnings are overstated by $854B due to AI-related…
- Keywords: s&p 500, ai capex, depreciation schedules, forward multiples, trailing multiples, chip and memory companies, nvda, microsoft, meta, amazon, google, 2027 earnings
- Source: Seekingalpha — https://seekingalpha.com/article/4953181-depreciation-subtleties-s-and-p-earnings-are-vastly-overstated
- Author: Dane Bowler
- Published: 2026-10-09T21:49:13+00:00
- Read time: 2 min
- Topics: s&p 500, ai capex, depreciation schedules, forward multiples, trailing multiples, chip and memory companies, nvda, microsoft, meta, amazon, google, 2027 earnings
## S&P 500 Trading at High Multiples
The S&P 500 trades at 18.8X forward and 26.15X trailing earnings, both well above historical norms and likely understated.
## AI Capex Inflates Earnings
AI capex expenses are being deferred via extended depreciation schedules, artificially inflating current S&P 500 earnings by approximately $854B.
## True Valuation Higher
Adjusted for true cash outlays, the S&P 500's forward multiple would be 24.8X, placing it in bubble territory.
## Historical Valuation Context
Yardeni Research shows S&P 500 forward multiples at 18.8X, with valuations only this high briefly during the pandemic and dot-com bubble.
## S&P 500 Earnings Breakdown
According to Morningstar, the S&P constituent total market cap is $65.93 trillion, implying forward earnings of $3.5T.
## Chip and Memory Contribution
About $577.7B of S&P 500 earnings comes from chip and memory companies, representing 16.5% of total earnings.
## Revenue vs. Expense Imbalance
Chip and memory companies anticipate $1.091T in 2027 revenues, but only $1.04T of expenses are recorded as S&P 500 costs.
## Depreciation Schedule Distortion
The entirety of $577.7B earnings are counted toward 2027 S&P 500 earnings, while only 18% of $1.04T expenses are expensed in 2027.
## Hyperscaler Depreciation Extensions
Alphabet extended depreciation from 4-5 years to six years in 2023, Meta to 5.5 years in 2025, and Microsoft to six years.
## Earnings Gap Calculation
This creates an $854B gap between cash S&P 500 companies pay versus what shows up as expenses.
## Valuation Impact
If S&P 500 companies treated all $1.04T as expenses, earnings would drop by $854B, pushing forward multiples to 24.8X.
## Bubble Territory Risk
The 24.8X forward multiple is astronomically high, placing S&P 500 in bubble territory with significant earnings growth pressure.
## Future Earnings Pressure
As depreciation catches up, future earnings growth will be significantly pressured, exposing valuation risk in 2028 and beyond.
## Key takeaway

S&P 500 earnings are overstated by $854B due to AI-related depreciation schedule delays, making the index bubble-like at 24.8X forward multiples.