How Do Concrete Vaults Actually Work?

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How Do Concrete Vaults Actually Work?

gm — let’s break this down properly.

You deposit into a vault.
You receive shares.
Your balance starts going up.

Simple on the surface.

But then you see things like eRate, NAV, and all these moving numbers… and it starts to feel like you’re just trusting the system without actually understanding it.

So let’s slow it down and really get what’s going on under the hood of Concrete vaults — in a way that actually makes sense.

1. From Your Perspective: What Just Happened?

You open a vault.
You deposit your funds.
You receive vault shares.

Now instead of seeing your raw deposit, you see:

number of shares

eRate

NAV changing over time

And the real question becomes:

What do I actually own?

Here’s the simple truth:

You don’t own a fixed amount of tokens anymore —
you own a portion of a system.

2. Vault Shares & eRate — Think “Slices of a Pie”

Imagine a vault like a big pie.

The entire pie = all the funds inside the vault

Your shares = your slice of that pie

When you deposit, you’re not just putting money in —
you’re getting a piece of the vault.

Now here’s where it gets interesting:

👉 The size of your slice (shares) stays the same
👉 But the value of the whole pie increases over time

That’s where eRate comes in.

eRate = how much each share is worth

So instead of your balance increasing because you have more shares…
your balance increases because each share becomes more valuable.

That’s the core mechanic.

3. NAV — The Pool Everyone Is Sharing

Let’s simplify NAV without any jargon.

NAV (Net Asset Value) = total value of everything inside the vault

That includes:

your deposit

everyone else’s deposits

all the yield generated so far

So:

NAV goes up → the vault is growing

NAV goes down → the vault is losing value (temporarily or otherwise)

Now connect it:

NAV = the full pie

Shares = your slice

eRate = how valuable each slice is

When NAV grows, your slice becomes more valuable — even if its size doesn’t change.

4. Why Time Matters (This Is Where Most People Get It Wrong)

A lot of people enter DeFi vaults thinking short-term:

“Let me deposit, earn quickly, and leave.”

That’s not how this works.

Think of a vault like a farm 🌱

You plant seeds (your deposit)

The system grows them (strategies)

Over time, you harvest more than you planted

But growth doesn’t happen instantly.

Here’s why time matters:

Strategies need time to generate yield

There are execution costs (gas, fees, rebalancing)

The system optimizes over time, not instantly

Short-term fluctuations happen, long-term trends matter more

If you keep pulling your funds out early, you’re basically:

digging up your crops before they grow

Time is what unlocks:

automated compounding

consistent yield accumulation

better optimization of capital

5. This Isn’t Passive — It’s Actively Managed

A big misconception:

“Vaults just hold my funds and earn yield.”

Not true.

Concrete vaults are closer to a system with an operator.

Think of it like a chef in a kitchen:

Ingredients = capital

Recipes = strategies

Chef = vault management system

The vault is constantly:

deploying capital into different opportunities

rebalancing based on market conditions

optimizing for better returns

This is what makes it managed DeFi, not just static yield farming.

It’s not just sitting there —
it’s working.

6. How This All Comes Together

Now connect everything:

Your deposit becomes vault shares

Those shares represent your ownership

The vault deploys capital across strategies

Yield is generated and added back into the vault

NAV increases

eRate increases

Your shares become more valuable

And because of automated compounding, this process keeps stacking over time.

So you’re not just earning yield —
you’re benefiting from:

better capital allocation

continuous optimization

and compounding growth

7. The Simple Mental Model

If everything above felt like a lot, keep this:

Vault = pooled capital system

Shares = your ownership

NAV = total value of the vault

eRate = value per share

Time = growth driver

Management = optimization layer

That’s it.

Once you understand this, DeFi vaults — and especially Concrete vaults — stop feeling confusing and start feeling predictable.

If you’ve read this far, you’re already ahead of most people interacting with DeFi.

Now instead of just depositing and hoping for yield…
you actually understand what’s happening.

Explore Concrete at app.concrete.xyz 🚀