Llsted is a private investment decision journal and a research desk for listed companies. You write down why you made a decision. The note is dated, and later you read it back to see whether your reason still holds. Llsted does not tell you what to buy, sell or hold. The decision stays yours.

That's the whole idea. Here's why it matters, even if you've never kept a journal in your life.

My memory is a generous editor

Think back to a decision you made a year ago. Maybe you bought shares in a company. Maybe you chose to wait. Can you say, exactly, why? Honestly?

Most of us can give an answer. Fewer can give the answer we'd have given on the day. Once we know how things turned out, memory quietly rewrites the script. If it went well, we remember being sure. If it went badly, we remember having doubts all along. Funny, that.

Psychologists call this hindsight bias. It affects everyone, not only investors. Mine always makes me look smarter than I was.

The cost is simple. If you can't recall your real reasoning, you can't learn from it. You end up judging a decision by its outcome alone. A good outcome can come from a weak reason, and a careful reason can still meet a bad outcome. Without a record, the two look the same.

So what is the journal, exactly?

An investment decision journal is a written record of your reasoning at the moment you decide. It isn't a spreadsheet of prices. It isn't a list of tips. It's your own words, kept in one place.

A useful entry is short. It answers a few plain questions:

• What did I decide? Bought, sold, held, or chose not to act.
• Why? Two or three sentences, in my own words.
• What would change my mind? The facts that would tell me the reason no longer holds.
• When will I look again? A date to re-read this entry.

That's enough. The value isn't in length. It's in writing the reason down before the outcome is known.

The date does the heavy lifting

An undated note can be edited after the fact, on purpose or not. A dated note is pinned to the day you wrote it. When you re-read it, you're reading what you actually thought, not what you now wish you'd thought.

On Llsted, you write the thesis once and it's dated. The price doesn't rewrite it. Small thing. Big difference.

Marking your own homework, fairly

A journal only helps if you go back to it. When you re-read an entry, keep two questions apart:

1. Was the reasoning sound, given what I knew then?
2. What happened afterwards?

Mix them up and hindsight sneaks back in. A decision can be well reasoned and still turn out badly. Another can be poorly reasoned and turn out well by luck. The journal lets you see which is which.

Over time, patterns may show up. Perhaps you often act on headlines. Perhaps your "what would change my mind" line is usually a bit vague. Only your own record can show you that, and Llsted doesn't pretend to know better.

Doing nothing counts too

Choosing not to act is also a decision. If you looked at a company and decided to wait, write that down too, with the reason. These are often the most useful entries later, because they're the easiest to forget.

Where Llsted fits

Llsted keeps your journal private and dated. Next to it sits a research desk: public company pages with a house S.I.F.T. score (Safety, Income, Fundamentals, Time). The score is a published, rules-based calculation, and the method is on the Llsted method page. It describes a company's figures. It isn't a forecast and it isn't a recommendation.

You can also ask for a reading of your journals. It uses only the notes you wrote. It doesn't tell you to buy, sell or hold, and it doesn't speak as a named investor.

The journal is the core. It's a habit, not an edge. It won't tell you what to do. It helps you see, later and honestly, what you were thinking.

Try it this week

Pick one decision you're weighing up. Before you act, write four lines: what, why, what would change your mind, and when you'll look again. Date it. Then leave it alone until that date comes round.

Future you will be grateful. Or at least better informed.

See how the dated journal works at llsted.com.

Not investment advice. For information only. Hallridge Holdings LLC is not a broker-dealer, registered investment adviser or licensed financial services provider in any jurisdiction. Llsted is an information and scoring tool and gives no personal or general financial advice or recommendations. Scores are rules-based screens of the data shown, not forecasts. Data comes from third-party sources and may be delayed. No outcome is guaranteed. Make your own decisions and consult a licensed financial adviser.