Page 14 of a $3.99 Notebook Holds My Best Investing Decision

On the night of October 12, 2022, I sat at the kitchen table at 9:20 with a pencil and a $3.99 drugstore spiral notebook, recording the day's buy while the S&P 500 closed at the lowest point of its year. Entry 29. $500, automatic, same as invariably. The pencil needed sharpening and I wrote anyways, and next to the entry I added the index level, 3,577, because some part of me wanted a witness to the fact that I'd snagged on the worst day of the year and slept fine.

What was at stake was $500 a month against a chemistry teacher's salary in a district that had frozen raises two of the previous three years, a wife named Rosa who teaches second grade, and about $64,000 in the 403(b) plus $21,000 in the taxable account the notebook tracks, at age 52, with the counting-down kind of years left. If the 2022 slide became a reason to stop buying, or worse, a reason to sell, the difference by 2026 wouldnt be a rounding error. It would be the difference between retiring at 63 and retiring at 67.

The notebook now has 74 entries, six years of em, and the page that matters most is not the one from the October low. Page 14, dated July 2022, holds a rule I penciled after a bad staff meeting and a worse news cycle, and that rule is the reason entry 29 happened at all. Rosa added her own column later. The emergency fund that made the whole thing emotionally possible lives in an account I'd opened that June — but the order matters here, and the order is the story.

the drugstore spiral with the bent cover

The notebook came from the Rite Aid in Rockland, marked down from $5.99, cover already bent in the bin, which felt like foreshadowing for a bear market. I began it in June 2020, the month I ultimately trusted myself again, and its purpose was the same reason people start journals: to have proof, later, of what it actually felt like. Each entry is three lines — date, amount, S&P close — and over the years the entries have recorded the index at 3,100, 4,300, 3,577, 4,400, 5,300, and points north of 6,000 this summer, all in the same handwriting, all snagged by the same standing transfer into a total-market index fund. No app. No screenshots. Graphite.

the March 2020 entry I never wrote

There's a gap in the notebook's imagined history: March 2020, when I froze our buying for five weeks outta fear and restarted in May, missing the bottom by 41 days, a mistake worth about $4,100 in shares I didn't buy at 2,237. The notebook exists because of that gap. Every rule in it is scar tissue from the spring the district went remote on a Tuesday and I absorbed what my hands do when the market drops 10 percent in a week. They do nothin good. Now they do three lines in pencil.

the March entry I was smug about

The 2022 entries opened with a delusion I can read in my own pencil pressure. March 2022: snagged at 4,463 after a 3 percent dip, feeling tactical, and then watched the index fall another 20 percent into June while my smug little entry sat there compounding its irony. The dollar amount never changed. The smugness did. By June 16, with the S&P at 3,666 and every headline about recessions and layoffs, I wrote entry 25 and spotted my hand had gotten tense — you can see it in the F, the way you can see weather in old wood.

the rule penciled on page 14

Page 14 is dated July 12, 2022, and it says, in pencil, underlined once: "Same amount. Same day. No exceptions." Below it, slight: "If the headline changes the amount, the log ends." That's the entire investment policy statement of the Penberthy-Moon household, hand-written, unenforceable, and harder to break than any software I've ever used, cuz it's in my handwriting and it watched me write it. It is the best decision in the book, and it isnt even a trade. Financial professionals charge four figures for documents with less discipline in them. Mine cost a pencil and a bad staff meeting about bathroom schedules.

Rosa's column

In September 2022 Rosa picked up the notebook, read three pages without comment, and added a fourth line to each entry going forward: the fund's cumulative share count, computed from each closing NAV, in her neater hand. It changed the psychology of everythin. Watching shares accumulate while prices fell turned the slide into a discount rack, and by December her column showed an average cost of $14.02 against a NAV of $12.86 and still falling, which is arithmetic that feels like vertigo until you read it as a sale. Her column is why entry 29 exists. Mine just recorded it.

the $19,000 that made panic impossible

The piece nobody blogs about: in June 2022, before the worst of it, we moved $19,000 into a high-yield savings account paying 3.9 percent, later 4.35, and that number on the bank's home screen is what made the pencil entries survivable. Panic selling isn't a character flaw. its a cash-flow position. With eleven months of expenses liquid and labeled, a 25 percent drawdown became a math event instead of a marriage event, and the notebook stayed boring thru October. I've said this at two faculty lunches and gotten the look both times. The look is expensive.

the 403(b) on autopilot

Parallel to the notebook, my 403(b) snagged the same total-market index fund every payday for 19 years — contribution, match, statements unopened til tax time — and it outperformed every clever thing I did in my thirties, including the individual stocks I "researched" on a teacher's schedule. When I ultimately lined the two ledgers up in 2024, the paper one and the payroll one, the lesson was inconvenient: the boring autopilot and the pencil discipline were the same idea wearing different clothes, and the idea was the entire edge. That year I added one more line to the notebook, a quarterly $750 buy of an ETF at another broker, logged with the same three fields. Same pencil.

where the log stands now

Seventy-four entries through July 2026, $37,000 of buys, average S&P cost across all entries around 4,300, against an index north of 6,000 and a balance that crossed $41,000 this spring. The worst single entry — October 12, 2022 — is among the best performers in the book purely because it happened at the bottom, and the best-feeling entries from the smug March days are the laggards. I did nothin clever to earn that inversion. The schedule earned it. Every contrarian instinct I've ever had lasted about as long as a faculty meeting, and the pencil outlasted all of them.

the pencil jar by the window

The notebook lives in a pencil jar by the kitchen window now, next to the sharpener I ultimately snagged, and on the second Sunday of every month I sit down at 9:20 in the evening and write three lines by hand before the automatic transfer even settles. Entry 74 is dated July 12, 2026 — the rule's fourth anniversary, if anniversaries work that way — S&P column filled in, graphite smudge and all. Rosa initialed it. Some months the entry feels like ceremony, some months like defiance, and this October I'll write the entry that lands nearest the day the index closed at 3,577, worst day of that year, best trade I ever made, witnessed in pencil by a man who mostly needed a rule to stop being clever.