You're the Portfolio Manager Now

I have to laugh at myself when I look back to my first adventures in the stock market. In 1999 I saved $2,500 from my summer jobs and opened an Ameritrade account. In a year my account had grown to over $30,000, and I thought I was a genius. Then the Bubble burst and I lost it all, because I didn't know how to play defense. In 2008 I watched another market rout and was too scared to "buy the dip" because I hadn't given myself any rules to take the emotions out of stock trading, and I missed a generational opportunity.

In the mid-2010s, I felt like I knew what I was doing and started buying a little bit of everything that looked shiny. I'd "take profits", panic sell dips, and just try to guess everything. The funny thing is that when I look back at my tax returns from those years, it was almost a net-zero outcome: the losses canceled any wins. I was undisciplined – and overwhelmed.

You Cannot Win This Race, and You Were Never Supposed to Run It

Last week I promised you a number. Here it is.

There are roughly 5,100 exchange-traded funds listed in the United States, holding somewhere near $14.9 trillion. Against that, about 3,450 stocks trade on the Nasdaq and another 2,200 on the NYSE — with some 6,500 more sitting out on the OTC markets. Put plainly: there are now nearly as many ways to buy a slice of the market as there are companies to buy.

Now do the math on what that means for you. If you sat down tonight to pick just ten funds out of those 5,100, the number of different portfolios you could build is somewhere north of a nonillion — a 3 followed by thirty zeros. For scale, there are an estimated seven quintillion grains of sand on Earth. You could give every grain of sand a trillion portfolios and still have combinations left over.

On the other side of that trade sit trading desks with co-located servers, doctorate-level quantitative teams, and execution measured in microseconds.

So let's be honest with each other about the assignment. You are not going to out-select that. Not with a phone app on a Tuesday night in the barracks, not with a subscription newsletter, not ever. And the harder truth: trying is not merely difficult, it's a waste of the one resource you actually control — your time.

But hands-off is not the answer either. That's the mistake on the other side of the ditch, and it's just as expensive.

Here's what actually works: a committed strategy, plus a little regular scheduled housekeeping. Six habits and one annual ritual. Install those, and you will master this faster than you think — not by beating Wall Street, but by refusing to play the game it wants you in.

Habit 1Pick a Target Allocation, and Commit

Write down what you intend to own, in percentages, and put a date on it.

That's it. That's the habit. And almost nobody does it.

Without a written target, there is no such thing as being off target — which means every market move becomes a fresh opinion, every headline becomes a decision point, and you end up managing your portfolio by mood. With a target, most days require nothing from you at all. That's the point.

Your target should reflect the Core Missions from earlier in this series: Growth, Income, Liquidity, and Preservation of Capital. Not tickers. Missions first, then the instruments that serve them. Here's an example: 80% index funds, 20% EV ETFs. (Not financial advice!)

Habit 2Put the Review on the Calendar

Once a year, minimum. Quarterly if you enjoy it.

The reason a scheduled review matters has nothing to do with the schedule. It's that a calendar appointment is the opposite of reacting to a headline. You look at your portfolio because the first Saturday in December arrived, not because a "finance bro" on Twitter used the word "crash" to describe the stock market.

Set the recurring reminder today. Same weekend every year. Or every three months. Treat it like a Fitness Test: it happens whether or not you feel like it.

Habit 3Rebalance Mechanically

If you set a strategic target (80% index), you have a duty to stick to it: you made that choice now because it was sensible, and you have to stick to it when emotions run high. Because your winners will grow past their target and your underperforming stocks will fall below theirs, you will need to make adjustments regularly. Rebalancing means trimming what's grown too large and buying what's fallen behind, until you're back at the percentages you wrote down in Habit 1.

It will feel backwards. You will sell the (currently) best-performing stocks and sell the (currently) losing stocks. In the long run, this will balance out even if it doesn't feel like it today.

It's also the only mechanism I know of that forces you to sell high and buy low without requiring you to predict anything. That's what the meme stock craze talks about but no one ever does: you will be the one who actually does it!

Habit 4Cut the Losers, Let the Winners Run

Peter Lynch put it better than anyone: selling your winners and holding your losers is like cutting the flowers and watering the weeds.

But read Habit 3 and Habit 4 back to back and they look like a contradiction. One says trim your winners. The other says let them run. Both are correct, and the distinction between them is the single most useful thing in this post:

You trim for allocation. You completely throw out on failure. Two entirely different triggers.

Trimming is arithmetic: a position outgrew its assigned percentage, so you bring it back to size. The position is still good. It's just too big.

Cutting is judgment. The reason you bought it is no longer true. And that is a different question from "is it down." When the story you believed turned out to be wrong or the company's economics turned out to be a bust, this is not a down this is a total loss. Sell it.

Habit 5Write the Plan Down

Which brings up the obvious problem with Habit 4: you cannot evaluate whether your plan failed if you never wrote one.

You have a Green Notebook and a Rite-In-The-Rain for writing down OPORDs and duty rosters, and important things like your investing are no different: write it down. For every position you hold, write one sentence: why you own it, and what would prove you wrong.

"I own this because it makes the equipment everyone else's product depends on. I'm wrong if a competitor matches its process."

Thirty seconds, once, at purchase. And it converts your December review from an emotional exercise into a checklist. You either got the thing you wrote down, or you didn't.

Habit 6Automate the Boring Part

Contributions on autopilot. Same day every month, straight from the LES.

Every decision you automate is a decision you cannot get wrong in a bad week. This is why the "S - Set Up Automation" step exists in our iCASH™ system: so you don't have to think about it.

Your December Checklist

Once a year, this is the whole job. Print it, screenshot it, put it wherever your reminder lives.

1. Harvest your losses.

   Sell positions sitting at a loss to offset realized gains elsewhere. Losses beyond your gains offset up to $3,000 of ordinary income per year, and anything left over carries forward indefinitely, a loss you book this year can still be working for you a decade out. One rule to respect: the wash-sale rule disallows the loss if you buy the same or a substantially identical security within 30 days before or after the sale. This only applies to losses, not to gains. Sit out the window, or buy something genuinely different.

2. Harvest your gains and reset your basis.

   This is the one almost nobody uses. Sell an appreciated position, pay the tax at today's rate, and buy it right back – the wash-sale rule does not apply to gains, so there's no waiting period. You now own the same asset with a higher cost basis, which means less taxable gain when you eventually sell for real. If you bought $1,000 of Nvidia and sell it at $100,000, you have to pay taxes on $99,000 at a high tax rate, but if each year you sell $5-10,000, your overall tax bill will be less and one day you'll have $100,000 of Nvidia stock tax-free!

3. Check whether you're in the 0% bracket — because you probably are.

   For 2026, long-term capital gains are taxed at 0% up to $49,450 of taxable income for single filers and $98,900 married filing jointly. Now remember how military pay actually works: BAH and BAS aren't taxable income, and the 2026 standard deduction subtracts another $16,100 (single) or $32,200 (MFJ) before you reach that. Confirm your sales make sense in your tax bracket.

4. Rebalance to your written target.

   Habit 1 meets Habit 3. Pull up the percentages, compare, correct. If your index position is now 85%, you need to sell 5% to get back to 80%.

5. Confirm contributions.

   On pace for the year, and set correctly for January. If you've been promoted or gotten a TIS pay raise, increase your contribution in dollar terms to stay on your plan as a percentage of total income.

Bringing It Home

You are never going to out-compute a trading desk, and you have no business trying. What you can do, and what they cannot do for you, is decide what you own, write it down, and show up once a year to enforce it. Control what you can control, and ignore what you can't.

Six habits. One December. That's the entire job.

The rhythm is the strategy.

This content is educational in nature and does not constitute financial advice, and tax situations vary — confirm your own bracket and circumstances with a qualified tax professional before acting. You are responsible for your own financial decisions. When in doubt, consult a licensed financial professional.

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