Difference Between Selic Rate and CDI: Understand It Simply
Difference Between Selic Rate and CDI: if you have ever invested or researched fixed income, you have certainly come across the terms Selic and CDI.
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Both are essential financial indexes in Brazil, but they perform different functions.
While the Selic is the basic interest rate of the economy, the CDI reflects the cost of lending between banks. But, after all, what is the difference between Selic and CDI rates, in practice?
In this article, we'll simplify these concepts, showing how each one influences your investments and the financial market.
Furthermore, we will explain why, despite being interconnected, they are not the same thing.
If you want to make smarter decisions about where to invest your money, understanding this distinction is crucial.
Finally, we will provide practical examples, comparative tables, and analyses of how these indexes affect everything from savings accounts to securities such as Treasury Direct and CDBs.
Let's go?
What is the Selic Rate and How Does It Work?
THE Selic (Special Settlement and Custody System) is the basic interest rate of the Brazilian economy, defined by Copom (Central Bank Monetary Policy Committee).
It serves as a benchmark for all other market rates, from bank loans to investment returns.
Also read our article on: Purposeful Finance: How to Spend on What Really Matters
When Copom raises the Selic rate, the objective is generally to control inflation, making credit more expensive and slowing consumption.
On the other hand, when the rate falls, the idea is to stimulate the economy, facilitating loans and encouraging spending.
Therefore, the Selic rate impacts not only investors, but the entire population.
Furthermore, Selic is used as a benchmark for the Selic Treasury, one of the safest public securities in the country.
Its yield follows this rate, making it a conservative option for those seeking protection and daily liquidity.
What about the CDI? How does it relate to the Selic rate?
THE CDI (Interbank Certificate of Deposit) is a rate used in loans between banks.
Since these institutions need to close the day with a positive balance, those with excess funds lend to those with a deficit, using the CDI as a reference.
Historically, the CDI closely follows the Selic, remaining slightly below.
For example, if the Selic rate is 10.75% per year, the CDI rate could be around 10.65%.
This little one difference between Selic and CDI rates exists because banks trade with each other at a small discount.
Many fixed income investments, such as CDBs, LCIs and LCAs, use the CDI as an indexer.
A CDB can yield “100% of the CDI”, meaning that it follows this rate.
Therefore, understanding the CDI is crucial to comparing different applications and choosing the most advantageous one.
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Main Differences Between Selic and CDI
| Feature | Selic rate | CDI |
|---|---|---|
| Definition | Basic interest rate of the economy | Interbank lending rate |
| Who defines? | Copom (Central Bank) | Interbank market |
| Use | Reference for the entire economy | Basis for fixed income investments |
| Direct influence | Inflation and monetary policy | Profitability of CDBs, LCIs, LCAs, etc. |
| Typical value | Slightly above the CDI | Just below the Selic rate |
How Do Selic and CDI Affect Your Investments?
If you have a Selic Treasury, its income is directly linked to the basic interest rate.
When the Selic rate rises, this security becomes more attractive; when it falls, its return decreases.
Already the CDI influences products such as CDBs, which often offer a percentage of this index (90%, 100%, 110% of the CDI).
Furthermore, the difference between Selic and CDI rates can define which investment is most advantageous.
In scenarios of rising Selic rates, government bonds tend to appreciate, while in periods of decline, investments tied to the CDI may be more stable.
Another important point is the liquidityWhile the Tesouro Selic allows for quick redemption, many CDBs have a maturity date.
Therefore, in addition to profitability, it is necessary to consider deadlines and financial objectives.
Which is Better: Investing Based on Selic or CDI?
The answer depends on your profile and the economic situation.
If you are looking for security and liquidity, the Tesouro Selic is a great option, as it follows the basic rate without credit risks.
On the other hand, CDBs linked to the CDI can offer higher profitability, especially in smaller banks that pay above 100% of the CDI.
It is worth remembering that, as the CDI tends to follow the Selic, both investments are correlated.
However, while the Selic is set by the government, the CDI is a reflection of interbank market conditions.
For those seeking diversification, the ideal is to balance investments in both indexes, taking advantage of the advantages of each.
This way, you mitigate risks and maximize returns.
How Do the Selic Rate and CDI Impact Inflation and Your Pocket?
The relationship between Selic, CDI and inflation is closer than many imagine.
When the Central Bank raises the Selic rate, the main objective is to curb consumption and, consequently, control price increases.
This happens because higher interest rates make credit and financing more expensive, discouraging spending.
But how does this connect to the CDI and, ultimately, your money?
THE CDI, in turn, reflects the cost of money between banks and directly influences lending rates for individuals and businesses.
If the CDI rises, interest rates on loans and credit cards also tend to increase.
Therefore, both Selic and CDI have a cascade effect in the economy, impacting everything from investments to the cost of living.
For the common investor, this movement means that, in periods of Selic rate hike, fixed income investments (such as Treasury Direct and CDBs) tend to yield more.
On the other hand, if interest rates fall, the return on these investments decreases, but credit becomes cheaper.
Therefore, understanding this dynamic helps to better plan where to allocate your resources according to the economic scenario.
Selic vs. CDI: Which One Affects Daily Life More?
While the Selic is a macroeconomic tool, used to control inflation and growth, the CDI has a more direct impact on the financial system.
For example:
- If you have a floating interest loan, it is the CDI (not the Selic) that will define part of the readjustment.
- Already the savings income is linked to the Selic rate: if it falls below 8.5% per year, savings will yield 70% of the Selic rate + TR.
In other words, although they are interconnected, each one acts on a different front.
Selic is like the economy thermostat, regulating the “heat” (inflation), while the CDI is the fuel that moves credit between financial institutions.
Strategies to Take Advantage of the Selic and CDI Rates in Investments
Knowing how these indexes work allows create smarter strategies. For example:
- If the Selic rate is high: priorize investments linked to it, such as the Treasury Selic, or CDBs that pay above 100% of the CDI.
- If the Selic rate is falling: invinvest in fixed-income securities or diversify into variable income, as fixed income will have lower returns.
- Monitor the CDI: medium and small banks usually offer CDBs with higher profitability than the average CDI on the market.
In the end, the difference between Selic and CDI rates It's not just technical, it defines real earning opportunities.
Whoever understands this relationship can anticipate trends and adjust your investments before most.
Understanding the Difference Between the Selic Rate and the CDI Rate
Now that you know the difference between Selic and CDI rates, it becomes easier to make smart financial decisions.
While the Selic is the thermometer of the economy, influencing all interest rates, the CDI is the parameter for many fixed-income investments.
If your goal is protection, the Tesouro Selic may be the best choice.
If you are looking for profitability, CDBs linked to the CDI may be more interesting.
In short, the secret is to understand how each index works and align them with your goals.
So, are you ready to apply this knowledge and optimize your investments?
Understanding these concepts is the first step to building a solid and profitable portfolio.
Difference Between Selic Rate and CDI: Frequently Asked Questions
1. What is the main difference between Selic and CDI?
The Selic is the economy's basic interest rate, while the CDI reflects loans between banks.
2. Why is the CDI always a little lower than the Selic?
Because banks trade with each other at a small discount, causing the CDI to be slightly lower.
3. Which yields more: Treasury Selic or CDB linked to CDI?
It depends.
The Treasury Selic is safer, but CDBs can offer higher returns, especially at smaller banks.
4. How often do the Selic and CDI rates change?
The Selic is adjusted every 45 days by the Coupon.
The CDI varies daily, following the interbank market.
