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Momentum Explained: Is Your Wealth-Building Speeding Up or Slowing Down?

Momentum measures whether your wealth velocity is accelerating or decelerating. Learn how Turbobulls calculates it, what good and bad values look like, and the trap of small baselines.
Momentum Explained: Is Your Wealth-Building Speeding Up or Slowing Down?
Your wealth velocity says you're building $50 a day right now. Last year you were building $30 a day. Momentum is the number that tells you: yes, you're speeding up - and by how much.
Velocity tells you the pace. Momentum tells you whether the pace is changing. It is the second derivative of your wealth - acceleration, not just speed. Positive momentum means you're building wealth faster than before. Negative momentum means you're slowing down, even if you're still moving forward.
Built for every reader. This article works whether you're brand new to investing or you've been doing it for decades. Anything marked For the math curious is optional - skip it if formulas make your eyes glaze over.

The One-Sentence Definition

Momentum is the percentage change in your wealth velocity between a recent sub-period and an earlier sub-period of the same date range.

Momentum is calculated automatically in Turbobulls, updated with every transaction. See it on your dashboard →

The Intuition: Speeding Up or Coasting?

Imagine you're saving and investing. Three months ago you were averaging 30 a day of net-worth growth. Last month you were averaging 50 a day. You're still building wealth, but you're also doing it faster than before. Momentum is the metric that captures that shift.

Person A: +60% momentum

Early velocity was 30/day. Recent velocity is 48/day. That's a 60% jump - strong acceleration. Probably came from a raise, a side income, or markets running hot.

Person B: -25% momentum

Early velocity was 100/day. Recent velocity dropped to 75/day. Still positive, but losing steam - maybe lifestyle inflation, or markets cooling. A warning sign worth investigating.

Momentum is direction-of-the-direction. It catches changes early - before they show up in your final balance.

The trickiest thing about momentum is that negative momentum does not mean you're losing money. You could be gaining wealth fast (positive velocity) while gaining it slower than you used to (negative momentum). The two numbers tell different stories.

What the Net Worth Badge Means

Inside Turbobulls, every metric carries a small scope badge that tells you what data feeds it. Momentum carries the Net worth badge.

That means it compares two velocity slices of your entire wealth picture:

  • Wallet cash (all your tracked cash accounts)
  • Portfolio market value (open positions at fair value)
  • Broker cash (uninvested cash sitting at brokers)
  • Minus debt (loans, credit cards, anything you owe)
Other Net worth metrics include Wealth velocity (the absolute pace) and Growth rate / CAGR (the equivalent annual rate). Momentum is the "is this getting better or worse" companion to those.

How to Read the Number

Momentum has no natural ceiling - it can range from -100% (velocity collapsed to zero) or lower (velocity turned negative) to many hundred percent (velocity jumped from a tiny baseline). Here is a practical guide:

MomentumWhat it typically means
< -30%Significant slowdown. Worth investigating: lifestyle inflation, dropping income, or a market cooldown.
-30% to 0%Decelerating. Still building, but losing steam compared with earlier in the period.
0% to 20%Steady, mild acceleration. Healthy if your velocity is already meaningful.
20% to 100%Strong acceleration. Recent wealth-building is materially faster than before.
> 100%Usually means the early period had a very small baseline - the percentage is exploding from a near-zero start.

Track Acceleration, Not Just Pace

Turbobulls computes your momentum automatically. Spot trend changes early, before they show up in your final balance.
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The Small-Baseline Trap

This is the most important caveat. A small early velocity makes momentum look explosive, even when the absolute change is modest.

Example: if your early velocity was 1/day (tiny baseline) and your recent velocity is 10/day, that's a 900% momentum. Spectacular on paper. But the absolute change is just 9 dollars a day - probably not life-changing.

If your momentum looks suspiciously high, check your wealth velocity. If the absolute pace is small, the percentage change is just statistical noise. Momentum is most reliable when both periods have meaningful velocity.

The same trap exists in reverse: an early velocity of -1/day shifting to +10/day produces a massive momentum number that means very little in absolute terms.

How Turbobulls Calculates Momentum

In plain words: Turbobulls splits your selected period into an "early" stretch and a "recent" stretch, computes the daily wealth velocity for each, and reports the percentage change between them.

You find it in the Overview's All figures card, under Growth, below Wealth velocity and Growth rate, on Investing Pro and Turbo Pro. Like the rest of the card, it covers the period picked at the top of the Overview.

All figuresThe last 12 months
Growth
Net worth change+29.3%+€17,090
Wealth velocity+€47 a dayThe last 12 months
Growth rate+6.1% a yearMoney put in not counted
Momentum+18%Growing faster lately
Best month+€2,555May 2026
Returns
Time-weighted return+10.4%Over the period
Money-weighted return+9.8% a yearYour timing counted
Gain on what you hold+17.5%+€7,060 not sold yet
Multiple on invested1.18xBack and held, for each 1 put in
Holdings in profit79%11 of 14
Risk
Sharpe ratio1.12Good for the swings
Largest fall-6.2%From a high to the low after it
Return volatility11.8%How much a year swings
A typical month±2.4%Net worth, up or down
Worst month-€195April 2026
Cash and costs
Cash runway7.5 monthsOf spending, from cash
Savings rate25%Of money in, over the period
Cash share31%Of net worth, aim about 20%
Debt3.3%Owed, of what you own
Fees and taxes€2144.9% of the gain
The All figures card on the Overview, on sample data: Momentum, +18%, sits in the Growth group below Wealth velocity and Growth rate, with "Growing faster lately" under it.
For the math curious
The actual formula:

momentum = (recentVelocity − earlyVelocity) / |earlyVelocity| × 100

Step by step:
1

Check data density. Sparse data uses a 50% split (compare first half to second half). Denser data uses a smaller fraction (down to 20%) so the comparison sub-periods are more current.

2

Compute early velocity. Slope of net worth across the first sub-period.

3

Compute recent velocity. Slope of net worth across the last sub-period.

4

Compare them. Percentage change between the two velocities, with a near-zero guard so a flat baseline doesn't produce a divide-by-zero blow-up.

Momentum needs at least 30 days of data and 4 sampling points to compute. Below that, the card shows N/A (not enough signal to compare two sub-periods meaningfully).

When Momentum Matters - and When to Ignore It

Care about momentum when...
  • Catching trend changes early. Slowing momentum with positive velocity is a warning that shows up before the balance dips.
  • Evaluating recent decisions. Did your spending changes or investing adjustments improve things?
  • Sustained tracking. Most useful once you have 6+ months of data with consistent transaction logging.
  • Long-horizon planning. If you want your wealth to compound, you want momentum to be at least non-negative.
Ignore momentum when...
  • Your velocity is tiny. Small baselines produce noisy, exaggerated momentum numbers.
  • Under 30 days of data. Below the threshold, momentum shows no figure, by design.
  • A one-off transfer happened. A big external deposit will spike velocity, then drop it, distorting both halves of momentum.
  • You're judging investing skill. Momentum mixes everything - savings rate, market returns, transfers. Not a clean investing signal.

The Full Picture: Pair Momentum With These

Momentum tells you direction of change. Pair it with these for the complete wealth-trajectory picture:

Quick Links

Wealth velocity - the absolute dollars per day your net worth is changing

Growth rate (CAGR) - your equivalent annual growth rate, smoothed across years

Sharpe ratio - the risk-adjusted version for investment performance specifically

Spot Wealth Trends Before They Hit Your Balance

Turbobulls computes your momentum automatically. Catch decelerations early, confirm that recent changes are working, and stay ahead of slowdowns.

  • Adaptive sub-period splitting based on data density
  • Automatic small-baseline guards against noisy values
  • Pairs with velocity and CAGR for the full picture
  • Multi-currency wealth handled natively
  • Date-range filtering to compare different stretches
  • Zero manual calculations - log a transaction, see updated metrics
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