Varsity Profile picture
Jul 15 9 tweets 2 min read Read on X
Don't be fooled by the 2.10% inflation number. There's more to it than meets the eye. Because there is something called core inflation, which is at 4.60%.

What is core inflation? How does it differ from inflation? We break this down in a quick Varsity explainer. (1/n) Image
Consumer Price Index (CPI) inflation measures the price change for a basket of goods and services of regular use, such as food, fuel, housing, clothing, education, health, and transport.

CPI inflation gets reported in the news headlines, so it is also called headline inflation. And this is at 2.10% now. (2/n)
Core Inflation is CPI inflation without food and energy prices.
Food and energy prices are removed from the calculation because they are dependent on external events like weather and geopolitics and the prices can be extremely volatile. Down one month and up the next. (3/n)
By excluding food and energy categories, core inflation serves as an indicator of the more persistent inflation trends. Or the underlying stickiness of inflation. At 4.6%, core inflation is stickier than CPI.
So, why is CPI so low? (4/n)
1⃣CPI is calculated on a year-on-year basis. So, 2.10% is CPI’s growth from June 2024 to June 2025. And if inflation back then was high and prices have moderated since then, it can lead to a lower inflation number. That is what has happened here. (5/n)
2⃣Food prices have been cooling down. In fact, the Consumer Food Price Index (CFPI) fell 1.06% from June 2024 to June 2025. Prices of vegetables and pulses have fallen by 19% and 11.76% respectively. Since F&B makes up nearly 50% of the CPI, that has pushed inflation lower, too. (6/n)Image
So, what does this mean for us?
The RBI makes decisions on interest rates based on inflation. If inflation is low, it keeps interest rates low as well. The belief is that if it’s cheap to borrow money, people and companies will borrow and spend. And this will push growth. (7/n)
It works in reverse, too; if the RBI wants to control inflation, it keeps rates high.
Today, overall inflation is within the RBI’s comfort range, but the core inflation stickiness could make the RBI think twice before making policy rate decisions when they meet in August. (8/n)
Remember, the central bank has already cut interest rates (repo) by 1% in 2025, from 6.5% to 5.5%, to promote borrowing and growth. And it may not be in a hurry for more rate cuts. (9/9)

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More from @ZerodhaVarsity

Jul 4
SEBI has banned Jane Street from the Indian securities market for manipulation. One strategy Jane Street used is ‘Marking the Close’.

Here is a Varsity explainer on how the strategy works and why it's illegal. 🧵👇(1/n) Image
Any option contract has an underlying, and its premium moves with the underlying. For e.g., Infosys' call option premium will rise if Infosys’ price rises, and its Put option premium will rise with a fall in its price. Basically, option premium is linked to its underlying price.
You can extend this to Index options, too. For instance, if the Nifty Index moves up, then the Nifty Call Option premium increases. Likewise with Bank Nifty. Do note, the underlying for these index options is the index itself, which in turn is a basket of stocks. (3/n)
Read 13 tweets
Jun 18
Should you shift all your money from a savings account to liquid funds?

The SBI savings account interest rate dropped to 2.5%, among the lowest we've seen in the past. Other banks also offer rates in the range of 2.5% - 3 % pa.

We got a bunch of queries asking if they should move their money from SB to liquid funds, as liquid funds' Yield to Maturity (YTM) is about 6%. But is that what you will really earn?

Here’s a Varsity explainer 🧵Image
We all understand liquid funds. They are MFs that invest in short-term debt securities issued by the Government, Banks, and companies.

Relatively, they are safe. But what most people don't understand is YTM. 🤔
YTM suggests the return (yield) you'll earn if you hold investments till maturity.

The average maturity of liquid funds in India as of today is about 1-2 months.

But you're likely to hold the fund for longer, right?
So what happens❓
Read 7 tweets
Jun 16
In 2024, Jane Street, a Wall Street high-frequency trading (HFT) firm, made a profit of over $2.3 billion in India alone. In 2023, they made about a billion dollars. India is one of their most profitable markets.

Do retail traders stand a chance against HFT traders? Here is Varsity’s take on this. 🧵👇(1/8)
Besides Jane Street, many Wall Street HFT heavyweights are active in India - Citadel Securities, Tower Research, and Jump Trading.

Trading is a zero-sum game. One trader's profit is another trader's loss. Jane Street alone inflicted a combined loss of $2.3 billion on its counterparties in a single year. We will not get into the how; that's another topic. (2/8)
The "High" in HFT is extremely high. Orders are posted in microseconds based on quantitative models that analyze gigabytes of data using technology that is out of bounds even to most institutions🤯. They have an army of PhDs and technology specialists who obsess over shaving off one-tenths of a microsecond in their algos. (3/8)
Read 8 tweets
Jun 10
The RBI recently slashed the repo rate by 50 bps. This is great news for the economy and borrowers in general because the interest you pay every month should reduce.

But then you see your next home loan EMI, and it has not changed; it's the same. Ever wondered why?

Here is a Varsity explainer and everything you need to know about home loans and the RBI’s repo rate.Image
There are two components to any loan: the interest rate that you pay and the tenure over which you repay your loan.

When the RBI reduces the repo rate, you naturally expect your EMIs to reduce. However, most banks usually keep the EMI amount the same, but reduce the loan tenure.

Of course, you can speak to the bank to reduce the EMI amount while keeping the tenure unchanged.
Both options reduce your interest outgo.
But it's usually better to opt for a loan tenure reduction rather than lowering your EMI.

Take a ₹50 lakh loan at 8% for 20 years.
If the rate drops by 0.5%:
👉Reduce tenure, keep EMI same → Save ~₹8.2 lakh in interest
👉Reduce EMI, keep tenure same → Save ~₹3.7 lakh in interest

As you repay the loan faster, you end up saving big on interest costs.
Read 9 tweets
Apr 16
SEBI’s debarment of Gensol and its promoters from the securities market has resurfaced the discussion on corporate governance.

Is there a way of spotting red flags in corporate governance? Let’s explore👇. 🧵(1/11) Image
When studying a listed firm, check for the "Independent Auditor's Report" in its annual report.

The first section of the Auditor's Report is titled “Opinion” or “Unqualified Opinion.” It is a red flag⛳️ if titled anything else. (2/11)
Usually, other titles are
1⃣Qualified Opinion: lack of complete info
2⃣Disclaimer of Opinion: Lack of info and unreliable financials
3⃣Adverse Opinion: The auditor outright disagrees with the financials provided by the firm
All these represent corporate governance issues. (3/11)
Read 11 tweets
Mar 27
What if we told you Nifty will expire somewhere between 23193 and 24006 on April 3rd, 2025?

No, a YouTube baba or WhatsApp University didn’t tell us that.

It’s from a legit research paper by Andrew Mack and Euan Sinclair that’s currently blowing up in the options world.👇(1/7) Image
The ATM straddle premium can be used to calculate the option's implied spot price at expiry.

Source: Retail Options Trading - Andrew Mack and Euan Sinclair, 2024. (2/7) Image
For example, if Nifty spot is at 23600 and the ATM straddle premium is ₹324.9 then the implied move is 1.25 x 324.9 = 406. At expiry, the spot is expected to trade between 23600 ± 406 = 23193 and 24006.

But how reliable is this? (3/7)
Read 7 tweets

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