Hot themes and FOMO

Defence, AI, PSU, “this time’s metal” - learn the pattern, not the pick.

7 min read · Intermediate · Updated 2026-09-06

A theme is a story that gathers funds, videos, and new categories. Some stories describe real businesses. The danger is the *crowd timing*: by the time the story is easy to hear, a lot of the price may already contain the story.

The pattern (not a shortlist)

  • A real-world headline.
  • A few stocks move.
  • Funds and reels arrive.
  • Households add a fifth thematic SIP “for the future.”
  • The theme cools. The SIP feels personal.

You will see this pattern again with new nouns. The nouns are not the lesson. The sequence is.

A satellite rule (personal, not advice)

After a core exists, some people allow a small slice - think single-digit percent of the garden - for a theme they can explain. The emergency bucket is never that slice. The rent is never that slice.

If the theme needs to be large to “feel worth it,” that is FOMO doing maths.

Crypto-adjacent and other loud rooms

Loud rooms can make 40% and lose 60% in the same personality. 301’s stance: if you cannot explain the thing without a slogan, it does not belong in the core. If you still want a tiny satellite, use money you can watch go quiet for years.

**Note:** No theme in this chapter is a recommendation. Names are examples of a pattern.

Where it breaks

Building the core out of last year’s three themes. Averaging down a theme with money that had another job.

  • Learn the sequence, not the noun.
  • Satellites stay small, after the core.
  • If it must be large to feel exciting, it is already too large.

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Key takeaways

  • Learn the sequence, not the noun.
  • Satellites stay small, after the core.
  • If it must be large to feel exciting, it is already too large.

Try next: Market Insights

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Educational only — not investment advice. Part of Markets with Judgment on Finnass Guides. Prefer hands-on tools? Open Calculators or the FIRE calculator.