How Do Concrete Vaults Actually Work?

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You open an app, connect your wallet, and deposit funds into one of the many DeFi vaults available today.

Almost instantly, your dashboard changes. Instead of a simple balance, you now see vault shares, something called eRate, and a number labeled NAV.

And that’s where confusion usually begins:

What do these actually mean — and how is your deposit growing?

Let’s walk through it step by step, in plain language.

Starting From Your Perspective

Imagine you deposit $1,000 into one of the Concrete vaults.

You don’t just see “$1,000” sitting there. Instead, the system gives you vault shares. At the same time, you notice the eRate changing and the vault’s total value — its NAV.

It feels unfamiliar because you’re no longer thinking in dollars. You’re thinking in ownership.

Vault Shares & eRate — Ownership That Grows

A helpful way to understand this is to picture a shared pool of money.

When you deposit, you’re not just adding funds — you’re buying a piece of that pool. That piece is represented by your vault shares.

The key idea is simple:

• Your number of shares stays mostly the same
• The value of each share increases over time

That value is reflected in the eRate.

At the start, one share might equal $1. As the vault generates yield, that value rises. You still own the same shares, but each one is worth more.

That’s how your balance grows without changing the number of shares you hold.

NAV — The Size of the Pool

Now let’s simplify NAV.

NAV is just the total value of everything inside the vault. No complexity needed.

Think of it like this:

• NAV is the size of the pool
• Your shares are your slice of that pool

If the total pool grows, your slice becomes more valuable — even if its size doesn’t change.

So when the vault performs well, the NAV increases. That increase flows directly into the value of each share, which is why the eRate rises.

Everything connects back to this one idea: a bigger pool means more valuable ownership.

Why Time Matters

One of the most important things to understand about DeFi vaults is that they are not built for instant results.

They are designed to work over time.

Your deposit isn’t idle — it’s being used across strategies that generate yield gradually. Some of these strategies take time to mature. Others depend on market conditions. There are also operational costs like gas and rebalancing.

If you move in and out too quickly, you interrupt this process.

A better way to think about it is like growing something. Early on, you don’t see much. Then progress becomes visible. Eventually, automated compounding starts to make a real difference.

Time allows:

• yield to accumulate
• profits to be reinvested
• volatility to smooth out

The longer you stay, the more these effects stack in your favor.

Active Management Behind the Scenes

Another key idea is that Concrete vaults are not passive.

They are part of what’s often called managed DeFi.

Instead of just holding assets, the vault actively deploys capital using onchain capital deployment. That means your funds are continuously moved and adjusted based on opportunities.

You can think of the vault as a system that:

• allocates capital across strategies
• rebalances when conditions change
• adapts to improve overall performance

This is important because your returns don’t come from a single source. They come from a combination of decisions made over time.

You benefit not just from yield — but from how that yield is managed.

How It All Connects

Once you put everything together, the mechanics become clear.

When you deposit, you receive shares that represent your ownership. The vault’s total value is tracked through NAV. As strategies generate returns, that value increases. This growth raises the eRate, which in turn increases the value of your shares.

Behind the scenes, capital is actively managed and continuously reinvested. Over time, this creates a compounding effect that strengthens your position.

The longer you participate, the more you benefit from both growth and optimization.

A Simple Mental Model

If you want to remember it in the simplest possible way:

• Vault = pooled capital system
• Shares = your ownership
• eRate = value of your shares
• NAV = total vault value
• Time = growth driver
• Management = optimization layer

That’s all you really need.

If you want to see how this works in practice, you can explore Concrete at app.concrete.xyz