Momentum Explained: Is Your Wealth-Building Speeding Up or Slowing Down?
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.
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)
How to Read the Number
Momentum has no natural ceiling - it can range from -100% (velocity collapsed to zero) to many hundred percent (velocity jumped from a tiny baseline). Here is a practical guide:
| Momentum | What 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
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.
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.
momentum = (recentVelocity − earlyVelocity) / |earlyVelocity| × 100
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.
Compute early velocity. Slope of net worth across the first sub-period.
Compute recent velocity. Slope of net worth across the last sub-period.
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.
When Momentum Matters - and When to Ignore It
- 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.
- Your velocity is tiny. Small baselines produce noisy, exaggerated momentum numbers.
- Under 30 days of data. Below the threshold, momentum shows 0 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:
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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