Invest on purpose

Turn an investing idea into a basket you can track.

Write a thesis, pick the stocks and set target weights, or start from one of 20 ready-made Ideas.

  • Weights add up to 100%
  • Charted vs the S&P 500
  • 20 ready-made Ideas

AI infrastructure

Target weights

NVDAAI chips
30%
TSMChip foundry
25%
ASMLChipmaking tools
20%
AVGONetworking chips
15%
AMATChip equipment
10%
The thesisPicks and shovels for the AI build-out.
Sample, for illustration

How it works

From a hunch to a basket

  1. Start from an idea

    Name a theme and the assistant drafts 5 or 6 stocks.

  2. Set target weights

    Weights must add up to 100%.

  3. Compare with the S&P 500

    Charted next to SPY, hypothetical until you invest.

  4. Invest when you're ready

    Pick an amount and approve the buys.

Ideas

Twenty ready-made baskets.

Each shows its holdings and how it tracked the S&P 500.

  • Sectors and themes

    Leaders in one trend.

    AI · Cybersecurity · Space Tech

  • Stock pickers' playbooks

    Approaches from Buffett, Lynch and Greenblatt.

    Coffee Can · GARP · Spin-offs

  • Income and quality

    Long dividend records.

    Dividend Kings · Aristocrats

  • Factor tilts

    One fund with a tilt.

    IWN · MTUM · USMV

Works well with

All features
The thematic baskets guideBy the Walnut team · Updated October 2026 · 3 min read

Common questions about baskets.

What is a thematic basket?

Short answer

A small group of stocks or funds picked around one idea, such as AI infrastructure. In Walnut it has a written thesis, the holdings and a target weight for each.

The thesis records why you bought. The shares sit in your own brokerage account.

Read the full guide: What is thematic investing?

How do I build a basket in Walnut?

Short answer

Name a company or theme and the assistant proposes 5 or 6 stocks, weights, a name and a thesis. Or fill in the form yourself.

An optional threshold sends an alert, at most weekly, when a funded holding moves that far from its target.

Read the full guide: How to build an investment thesis with AI

What are Walnut's Ideas?

Short answer

Ideas are 20 ready-made baskets on five shelves, from sector themes to factor tilts. Each shows its holdings and how it tracked the S&P 500.

Invest in one and it becomes your own basket to edit. A few, like Buffett Hathaway, are snapshots refreshed by hand.

20

Ready-made Ideas on the shelf

100%

What every basket's weights add up to

2 to 4

Baskets on one comparison chart

Read the full guide: What thematic investing is

How is a basket compared with the S&P 500?

Short answer

Each basket is charted next to SPY. Before you invest, the line is hypothetical, from your target weights. After, it shows the return on what you bought.

Idea charts go back five years. The Compare page puts two to four baskets on one chart.

Read the full guide: How to compare your portfolio to the S&P 500

A Walnut basket vs a thematic ETF

Walnut basketThematic ETF
Who picks the holdingsYou, or a ready-made IdeaThe fund's index or manager
What you ownEach stock, at your brokerShares of one fund
Changing a holdingEdit it any timeNot up to you
Back to targetTrades drafted, you approveDone inside the fund
Yearly costNo fee on assetsAn expense ratio

ETF terms vary by fund; check its prospectus.

Read the full guide: Thematic and sector investing, the full guide

Quick answers

Can I buy a basket at any broker?
Walnut places buys at Public, a Robinhood Agentic account and eight more brokers, such as E*Trade. Elsewhere, buy at your broker and claim the holdings.
Does a basket count stocks I already own?
Only what you bought through it, or claim with "I bought these myself".
Can I change a basket after investing?
Yes, any time. The Rebalance tab drafts the trades back to target for you to approve.
Are Ideas picked for me?
No. The shelf is the same for everyone.
Does it cost anything?
No. Baskets and Ideas are free, with no fee on assets.

Keep reading

Have a theme in mind?

Get a draft basket in seconds.

Build a basket

Walnut is an AI financial advisor app; it is not a registered investment adviser. Nothing here is a recommendation to buy or sell a security. Examples on this page are samples, not real accounts.

Put your next idea into a basket.

Nothing is bought until you say so.

Build a basket