Your Brokerage App Is Lying to You About How You Are Doing

Open a brokerage app and one of the most prominent numbers is usually the gain or loss on the account.

It might say a stock is up 45 percent. That feels like a useful measure of whether buying it was a good decision.

But there is a basic problem with that number: it tells an investor how much the position has gained since it was purchased, not whether it has performed well.

Those sound like the same question. They are not.

A 45 percent gain can be good or bad

Suppose an investor buys a stock for $10,000 and it is now worth $14,500.

The brokerage app shows a 45 percent gain. Nothing about that calculation is wrong.

But imagine that gain happened over four years while the broad market returned substantially more over the same period. The investor made money, but choosing that particular stock still produced a worse result than the simpler alternative.

Now imagine the same 45 percent gain happened in nine months while the market rose 12 percent.

Same green number. Completely different performance.

That is the limitation of looking at gain against cost basis. It combines the return of the investment with the date the investor happened to buy it.

The number is useful for answering, “Am I up or down?”

It cannot answer, “Was this a good investment compared with what else I could have owned?”

The benchmark changes the story

A better way to evaluate a holding is surprisingly simple.

Pick a period. One year is an easy place to start.

Measure the return of the investment over those twelve months. Then measure the return of a reasonable benchmark over exactly the same twelve months.

If the stock returned 18 percent and the benchmark returned 25 percent, the investor is up 18 percent but behind the benchmark by seven percentage points.

If the stock fell 4 percent while the benchmark fell 15 percent, the brokerage screen is red, but the stock actually outperformed the benchmark by 11 percentage points.

This is why green does not necessarily mean good and red does not necessarily mean bad.

There are two important rules when making the comparison.

The dates have to match. Comparing a stock since the day it was purchased with an index’s calendar-year return does not produce a meaningful comparison.

The type of return also has to match. If dividends are included for the index, they should be included for the holding as well.

Once those two things are consistent, the calculation becomes much more useful.

Side-hustle income makes the brokerage number even messier

This matters particularly for people who invest money from freelance work, side hustles or a small business.

Investment contributions often arrive whenever the income arrives.

A $6,000 client payment might produce a large investment one month. The next month there may be nothing. A particularly good quarter for the business might result in a much larger contribution.

That means entry prices can be clustered around whatever the market happened to be doing when invoices were paid.

Consider someone who had an unusually profitable year from a side business and invested a large amount near a market high. The brokerage account could show an ugly loss against cost basis for months afterward.

That does not necessarily mean the investments themselves are performing unusually badly. Part of what the screen is showing is simply unfortunate purchase timing.

Someone investing the same amount every month from a paycheck has a smoother series of entry prices. Someone investing irregularly does not.

A fixed-window benchmark comparison helps separate those two things.

It asks how the investment performed during a particular period rather than how lucky the investor happened to be on the day money became available.

Then comes the uncomfortable part

Do this for every meaningful position and the portfolio often looks different.

A few stocks may genuinely have beaten the market.

Some may have produced almost exactly the same return as the index. That raises a reasonable question: was taking the additional risk of owning an individual company worthwhile if the result was essentially an index return?

Others may have underperformed for years while still showing a large green gain because they were purchased long ago.

And sometimes the entire exercise produces the least exciting result possible: the portfolio has performed roughly like the market.

That is not a failure.

Beating a broad benchmark consistently is difficult even for professional investors. S&P Dow Jones Indices’ year-end 2025 SPIVA data found that 89.93 percent of active U.S. large-cap funds underperformed the S&P 500 over the preceding 15 years. citeturn0search0

Matching the market therefore should not be treated as an embarrassing result. The more interesting question is how much additional time, risk and attention went into producing it.

If someone spends several hours every week researching stocks only to approximately reproduce an index, that is useful information about how that time is being spent.

The calculation is easy. Collecting everything is annoying.

None of this requires particularly sophisticated mathematics.

The difficult part is assembling the data.

An investor needs the value of every holding at the beginning and end of the same period, the appropriate benchmark return, dividends where relevant and ideally some record of positions that were sold during the period.

Doing it once in a spreadsheet is manageable. Doing it repeatedly across a portfolio is tedious.

This is one place where portfolio-analysis tools can be useful. There are AI investing apps that connect to an existing brokerage and calculate portfolio and benchmark performance removing much of the manual work.

The useful part is not that AI is involved. It is that the calculation can be checked.

If a tool says a holding returned 11 percent while its benchmark returned 17 percent over the same period, those numbers can be independently verified.

If it says the holding will outperform the benchmark next year, that is an entirely different kind of claim.

For evaluating past performance, arithmetic is more useful than prediction.

Underperformance does not mean sell

Finding that a stock underperformed its benchmark does not automatically produce a trading decision.

A quarter is a very short period. A year may also say relatively little about an investment intended to be held for a decade.

The value of benchmarking is not that it creates a mechanical sell rule.

It forces the investor to revisit the reason a position exists.

If a company was purchased specifically because it was expected to outperform the market and it has trailed that market for five years, there is at least a question worth asking.

Has the original thesis played out more slowly than expected? Has something about the company changed? Was the thesis wrong? Or is the chosen benchmark itself inappropriate?

Those are investment questions.

“Am I still green?” is mostly an accounting question.

Benchmark the winners too

There is one more useful exercise, and it applies when the numbers look great.

If a holding has beaten the market substantially, write down why.

Not simply “this was a good company.” Write down what happened that made the investment outperform and whether that was part of the original reason for buying it.

Then revisit that explanation a few years later.

Investors naturally remember their successful decisions more clearly than the positions that disappointed them, particularly after losing positions have been sold and disappeared from the brokerage home screen.

Keeping a record makes it harder for those forgotten positions to vanish from the assessment of past decisions.

The point of measuring performance against a benchmark is not to prove that an investor is good or bad at picking stocks.

It is to answer a much simpler question accurately.

Did taking this particular investment risk produce a better result than the alternative?

The gain number on a brokerage screen cannot answer that question on its own, no matter how green it is.

Disclosure: Walnut is one of the tools referenced in this article. This article is informational and not investment advice. Walnut is not a registered investment adviser. Past performance does not indicate future results. Investing involves risk, including the possible loss of principal.

This post may contain affiliate links.

More Recommended Ebike/Scooters

Check out these other ebikes and scooters I've reviewed:

Urban Arrow Ebike – Last year, I made one of the largest purchases I’ve ever made – I bought a $9,000 electric cargo bike from Urban Arrow. In my Urban Arrow review, I will discuss what it is and why I decided to buy this bike, as well as discuss how impactful a bike like this can be on your journey to financial independence.
Troxus Explorer Step-Thru Ebike – The Troxus Explorer Step-Thru is a fat-tire ebike that I’ve had the pleasure of riding for a while now. It has amazing power, great looks, and awesome range. If you’re looking for a great fat-tire ebike that offers a lot for the price, the Troxus Explorer Step-Thru is definitely one for you to consider. Check out my Troxus Explorer Step-Thru Review.
Hovsco HovBeta Ebike – The HovBeta is a folding ebike with great specs and a lot of interesting features, and importantly, it’s sold at a good price point. I’ve had a blast commuting with it and using it to do deliveries with DoorDash, Uber Eats, and Grubhub. Check out my Hovsco HovBeta Ebike Review.
Vanpowers Manidae Ebike – The Vanpowers Manidae is a fat tire ebike that I’ve been riding as my primary winter commuting bike and have also been using it to do food delivery with apps like DoorDash, Uber Eats, and Grubhub. After clocking in a decent number of miles with this ebike, I wanted to write a post sharing what my experience with the Vanpowers Manidae ebike has been like. Check out my Vanpowers Manidae Review.
Sohamo S3 Step-Thru Folding EBike Review – A Great Value Folding Ebike – The Sohamo S3 Step-Thru Folding Ebike is an entry-level folding ebike that offers a lot of value for the price point. I’ve been riding the Sohamo S3 for a while now, putting the bike through its paces, and I have to say, this bike has exceeded all of my expectations. Check out my Sohamo Review.
KBO Flip Ebike – The KBO Flip is an excellent bike. I’ve had a great time riding it and think it’s a versatile bike that can be used for a lot of purposes and can fit a variety of lifestyles. It’s worked out great for me as a general commuter bike and as a food delivery bike. Check out my KBO Flip Review.
Hiboy P7 Commuter Ebike – The Hiboy P7 is an excellent electric commuter bike that’s offered at an affordable price point. The range and speed of this bike are both very good, so you won’t have any trouble getting anywhere you need to go with it. As a food delivery vehicle, this is also good – with how much range it offers, you’ll be able to work all day on a single charge. Check out my Hiboy P7 Commuter Electric Bike Review.
Himiway Escape Ebike – The Himiway Escape is an interesting bike for anyone looking for a moped-style ebike. If you’re a gig economy worker, the Himiway Escape is particularly interesting and it’s possible to think of it as an investment, especially if you can opt to do deliveries with the Himiway versus using a car. It’s not cheap, but you can definitely make your money back when you compare the mileage you’ll put on your car versus using an ebike. Check out my Himiway Escape Bike Review.
Espin Sport Ebike – The Espin Sport is a good ebike for someone who is looking for an ebike that feels and rides more like a regular bike. There are many ebikes that are really only bikes in name. In reality, they’re basically electric mopeds. The Espin Sport, by contrast, is a bike you could probably ride without the battery and you’d feel like you’re just riding a regular bike. Check out my Espin Sport Review.
Varla Eagle One Scooter – The Varla Eagle One is an excellent scooter that can make sense for a lot of people. It can work as a primary mode of transportation. You can use it to work on gig economy apps like DoorDash, Uber Eats, and Grubhub. And it can also be a recreational vehicle if you’d prefer to use it for that. Check out my Varla Eagle One Review.
Varla Falcon Scooter – The Varla Falcon is an excellent scooter that offers a good amount of power at a lower price point compared to more powerful scooters. It’s not exactly an entry-level scooter, nor is it a high-powered scooter. I think it fits somewhere in-between those two categories – an intermediate scooter if I had to give it a category. Check out my Varla Falcon Review.
Hiboy S2 Scooter – The Hiboy S2 is an excellent entry-level commuter scooter that's perfect for someone looking to save some money in transportation costs and improve their commute. Check out my Hiboy S2 Review.
Hiboy S2R Scooter – The Hiboy S2R is one of the more interesting electric scooters I’ve been able to test out. It’s not a high-powered scooter, but for an everyday transport option, it’s very useful, especially given some of the unique features that it has. Indeed, for the price, the Hiboy S2R might be the best value scooter I’ve used. Check out my Hiboy S2R Review.
Fucare H3 Scooter – The Fucare H3 is a fun scooter and I’ve enjoyed testing it out. For a daily commuter or quick trips or errands, the Fucare H3 is probably the scooter I’ll use. It’s portable and easy to maneuver, so it’s just easier to take on the road when I need it. Check out my Fucare H3 Scooter Review.

More Recommended Investing App Bonuses

For additional investing app bonuses, be sure to check out the ones below:

M1 Finance ($75) – This is a great robo-advisor that has no fees and allows you to create a customized portfolio based on your risk tolerance. You also get $75 for opening an account. Check out my M1 Finance Referral Bonus – Step-By-Step Guide.
SoFi Invest ($25) – SoFi Invest is an easy brokerage account bonus that you can earn with just a few minutes of work. Use my SoFi Invest referral link, fund your SoFi Invest brokerage account with just $10 and you’ll get $25 of free stock. I also have a step-by-step guide for the SoFi Invest referral bonus.
Robinhood (1 free stock) – Robinhood gives you a free stock valued between $2.50-$225 if you open an account using my referral link.
Public (1 free stock) - Public gives you a free stock valued between $3-$70 if you open an account using my referral link.

More Recommended Bank Account Bonuses

If you’re looking for more easy bank bonuses, check out the below options. These bonuses are all easy to earn and have no fees or minimum balance requirements to worry about.

Ally Bank ($100) – Of all the banks out there, Ally is, without a doubt, my favorite. At the moment, Ally is offering $100 to customers who open an eligible Ally account and meet the requirements. Here are the step-by-step directions to earn your Ally Bank referral bonus.
Chime ($100) - Chime is a free bank account that offers a referral bonus if you use a referral link and complete a direct deposit of $200 or more. In practice, any ACH transfer into this account triggers the bonus. This bonus is easy to earn and posts instantly, so you’ll know if you met the requirements as soon as you move money into the account. I wrote a step-by-step guide on how to earn your Chime referral bonus that I recommend you check out.
US Bank Business ($400/$1200) – This is a fairly easy bank bonus to earn, since there are no direct deposit requirements. In addition, you can open the Silver Business Checking account, which comes with no monthly fees. Check out how to earn this big bonus here.
Current ($50) – Current is a free fintech bank that’s offering new users a $50 referral bonus after signing up for an account using a referral link. Current is an easy bonus to earn and also gives you access to three savings accounts that pay you 4% interest on up to $2,000. That means you can put away up to $6,000 earning 4% interest. That’s very good and makes Current an account I recommend to everyone. Check out my step-by-step guide on how to earn your Current Bank bonus.
Novo Bank ($40) - Novo bank is a free business checking account that’s currently offering a $40 bonus if you open a Novo business checking account using a referral link. In addition to being a good bank bonus, Novo is also a good business checking account. It has no monthly fees or minimum balance requirements and operates a good app and website. Indeed, it’s the business checking account I currently use for this blog. Check out my post on how to easily open a Novo account.
Varo ($25) – Varo is a free fintech banking app similar to Chime or Current. It’s currently offering a $25 bonus to new users that open a new Varo account with a referral link. The bonus for this bank is very easy to meet, all you need to do is spend $20 within 30 days of opening your Varo account. Check out my step-by-step guide to learn how to earn this bonus.

Kevin is an attorney and the blogger behind Financial Panther, a blog about personal finance, travel hacking, and side hustling using the gig economy. He paid off $87,000 worth of student loans in just 2.5 years by choosing not to live like a big shot lawyer.

Kevin is passionate about earning money using the gig economy and you can see all the ways he makes extra income every month in his side hustle reports.

Kevin is also big on using the latest fintech apps to improve his finances. Some of Kevin's favorite fintech apps include:

SoFi Money. A really good checking account with absolutely no fees. You'll get a $25 referral bonus if you open a SoFi Money account with a referral link, and an additional $300 if you complete a direct deposit.
5% Savings Accounts. I'm currently getting 5.24% interest on my savings through a company called Raisin. Opening a Raisin account takes minutes to complete, it's free, and all of your funds are FDIC-insured. I explain how it works, why I'm now using it to store my emergency fund and any other cash savings I have, and why I recommend everyone check it out in this review.
US Bank Business. US Bank is currently offering new business customers a $400/$1200 signup bonus after opening a new account and meeting certain requirements.
M1 Finance. This is a great robo-advisor that has no fees and allows you to create a customized portfolio based on your risk tolerance. You also get $75 for opening an account.
Empower. One of best free apps you can use to monitor your portfolio and track your net worth. This is one of the apps I use to track my financial accounts.

Feel free to send Kevin a message here.