How BAD Are Stock Valuations Really?

The AI Bubble Debate [0:00]

• Widespread concern exists that the stock market, particularly US tech stocks, is in an AI-driven bubble.
• Companies are investing heavily in AI infrastructure, yet many remain unprofitable, contributing to market anxiety.
• Rising oil prices, treasury yields, and inflation add to concerns about market sustainability.

  "The number one question in stock investing right now, is AI going to kill us?"

Individual Valuations vs. Market Health [0:48]

• While the overall market's bubble status is debated, many individual AI companies are seen as having questionable valuations.
• SpaceX is cited as an example of a company with a high market cap relative to its revenue.
• The sustainability of the current market run-up is questioned due to various red flags.

  "And there are plenty of red flags, plenty of reasons why the current stock market run-up is not sustainable."

Defining and Measuring Market Valuation [1:45]

• Determining if the market is in a bubble is difficult and depends on the metrics used.
• Some argue that high valuations are justified by the massive potential of AI.
• The S&P 500, representing 500 of the largest US stocks, is used as a proxy for the US stock market.

  "But whether the market as a whole is in a bubble or not is actually quite difficult to determine because it depends on what you look at."

Historical Valuation Metrics: CAPE Ratio [3:42]

• The cyclically adjusted price-to-earnings (CAPE) ratio, which smooths earnings over 10 years, suggests extreme overvaluation, nearing dot-com bubble levels.
• This metric is designed to reduce short-term volatility but may understate valuations during periods of rapid earnings growth, like the current AI-driven surge.
• Recent S&P 500 earnings growth has significantly outpaced historical averages.

  "We are currently above 40 times a level not seen since the dot-com bubble, and the metric is fast approaching a new all-time high, which yeah, is pretty alarming."

Trailing and Forward PE Ratios [6:14]

• A simplified trailing PE ratio, using the past 12 months' earnings, shows elevated but lower valuations than the dot-com peak.
• Forward PE ratios, based on estimated earnings for the next 12 months, are heightened but also below the dot-com peak.
• Estimates for future earnings are inherently uncertain, with analysts often being too optimistic.

  "But today, the measure, while certainly more elevated, is well below what we saw during the peak of the dot-com bubble."

Forward PEG Ratio and International Comparisons [8:28]

• The forward PEG ratio (Forward PE divided by 5-year estimated earnings growth) suggests the S&P 500 might be cheap, as expected growth outpaces current valuations.
• Comparisons with smaller US indices (S&P 600, S&P 400) show they are cheaper on a forward PE basis, but the S&P 500 is lower on a PEG basis.
• International markets, measured by MSCI All Country World Index ex US, appear cheaper on a forward PE basis and are expected to grow earnings at a similar pace to the S&P 500.

  "And this is going to be the most controversial metric here, because it actually suggests that the S&P 500 is cheap."

Caveats and Risks [11:06]

• Forward valuations rely on forecasts, which are often inaccurate, with analysts tending to be overly optimistic.
• The S&P 500 is highly concentrated in a few companies (e.g., "Magnificent 7"), which have above-average valuations.
• Projected earnings growth is largely driven by cost savings, which may be unsustainable or diminished by rising AI usage costs.
• Capital expenditures on AI infrastructure may not be fully reflected as expenses, potentially skewing earnings figures.
• The equity risk premium is low, indicating investors are taking on significant risk for relatively modest additional returns over Treasury bonds.

  "The first biggest one, again, being that when we're talking about forward valuations, we're relying on forecasts, which we all know how great people are at those."