The Ketan Parekh Scam, Explained

The Ketan Parekh scam was a 1998-2001 stock market manipulation run by Mumbai stockbroker Ketan Parekh, who artificially rigged the prices of ten thinly-traded stocks (the K-10) using money illegally borrowed from co-operative banks. When the bubble burst in March 2001, the Sensex fell 176 points and SEBI's modern surveillance era was born.

Between 1998 and 2001, a soft-spoken chartered accountant from Mumbai rigged the prices of ten Indian stocks so aggressively that some of them rose 10x, 20x, even 80x in under two years. He did it with money he had no right to be holding. When the bubble cracked the day after the 2001 Union Budget, the Sensex fell 176 points and two banks effectively died.

That was the Ketan Parekh scam. If you trade in Indian markets today, you're trading inside the regulatory architecture it forced into existence: rolling settlement, the death of badla, real-time surveillance, the ban on circular trading.

Who was Ketan Parekh?

Ketan Parekh was a chartered accountant who took over his family's brokerage firm NH Securities in the late 1980s. By itself, that's an unremarkable resume.

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What changed his trajectory was a stint at GrowMore Research & Asset Management, Harshad Mehta's firm. He was there during the years the Big Bull was rigging the markets in what would become the 1992 scam. Parekh wasn't named in that case. But he watched, and he learned the playbook.

By 1999, he had his own playbook running. Same skeleton: borrow money you shouldn't have, push it into a small set of low-liquidity stocks, ride the price up, exit before anyone notices.

The differences were the decade and the cover. The dot-com boom gave him IT and media stocks to manipulate. And his public persona, soft-spoken and well-connected and friendly with Bollywood and politicians, gave the operation a layer of respectability Mehta never had.

The press eventually nicknamed him the Pentafour Bull, after one of his rigged scrips. Inside the market, the ten stocks he was running became known as K-10.

How the scam actually worked

Strip away the headlines and the scam was three things stacked on top of each other: a stock-picking strategy, a price-manipulation strategy, and a financing strategy. Each one was illegal. Together, they were a machine.

I'll explain each layer the way I'd explain it in a classroom. Slowly, because the mechanics aren't intuitive the first time you read them, and because every piece of it teaches you something about how Indian markets are structured even today.

Step 1 — Pick stocks nobody is watching

Parekh handpicked stocks with two characteristics: low liquidity (very few real buyers and sellers on a normal day), and a story that made a price ramp seem plausible. In 1999-2000, that meant IT, media, and telecom. The dot-com narrative was already pulling these sectors up, so a 5x move in some unknown software company didn't look obviously absurd.

Low liquidity was the key. If a stock trades 10,000 shares a day, a single buyer with deep pockets can dominate the order book. The price becomes whatever that buyer wants it to be.

Step 2 — Manufacture demand through circular trading

Once he had the stocks, Parekh and his network of associated entities started circular trading: buying and selling the same shares between accounts he controlled. No real change of ownership, just the appearance of frantic activity.

From the outside, the order book looked alive. Volumes were rising. Prices were ticking up.

Retail investors and the financial media saw "momentum" and piled in chasing it. That real demand pushed prices further. Parekh's circular trades were the spark; the public was the fuel.

To make the rigging even safer, he routed a large part of his volumes through the Calcutta Stock Exchange (CSE), where surveillance was much weaker than at NSE or BSE.

Step 3 — Borrow money you shouldn't have to scale it up

Pumping ten stocks at once needs an enormous amount of capital. Parekh didn't have his own. He went to the banks, specifically to weakly-governed co-operative banks where the rules were easy to bend.

The most notorious was the Madhavpura Mercantile Co-operative Bank (MMCB) in Ahmedabad. RBI rules at the time capped a co-operative bank's exposure to a single stockbroker at ₹15 crore. The JPC record shows the MMCB exposure to the Ketan Parekh group eventually reached ₹888.25 crore outstanding, in batches that violated every prudential limit on the books.

Some of that money came in as ordinary loans. The most brazen tranche came as pay orders, which are banker's cheques essentially, issued in the names of Parekh's three companies (Classical Shares, Panther Investrade, Panther Fincap) and discounted by Bank of India.

The pay orders weren't backed by real collateral. They were a manufactured stream of cash that bought him another few weeks of price-pumping.

The whole operation was a closed loop: borrowed money rigged the price, the rigged price became collateral for more borrowed money, and the cycle repeated.

The K-10 stocks

The K-10 list isn't completely fixed across sources. The official Joint Parliamentary Committee (JPC) report on the scam identified the K-10 stocks as Aftek Infosys, DSQ Software, HFCL, Global Tele-Systems, Pentamedia Graphics, Ranbaxy Laboratories, Silverline Technologies, Satyam Computers, SSI Limited, and Zee Telefilms. The report noted that, occasionally, almost 60% of all trading on the exchanges related to these ten scrips alone. Some media reports and later summaries mention additional Parekh-linked momentum stocks, but the JPC list is the authoritative one.

These weren't blue-chip names in the way today's index leaders are. With the exception of Ranbaxy and Satyam (later subject to its own famous accounting fraud), they were thinly-traded scrips with weak fundamentals and stories that fit the dot-com mood. The price moves they put in over two years are the only headline you need.

Look at those numbers and ask yourself a simple question. What real-world business changes by 80x in 24 months? Not earnings, not revenue, not market share, not customer base.

There is no fundamental story that supports a chart like that. The only thing that grew that fast was the order book, manufactured by Parekh's own circular trades.

The trap for retail investors was that the early part of the move was fuelled by genuine sectoral momentum. The dot-com narrative was real. That's exactly what made it dangerous.

The first 3x looked like the dot-com story playing out. The 30x that followed was Parekh.

How it unravelled — March 2001

Every leveraged manipulation ends the same way. The operator has to keep pumping forever, because the moment the price stops rising, the pledged shares start losing value, and the bank starts asking for more collateral.

By February 2001, two things were happening simultaneously. The dot-com bubble had cracked globally, with the Nasdaq already falling for almost a year. And a rival "bear cartel" of brokers in Mumbai had started shorting the K-10 stocks, betting that the prices were a house of cards.

Parekh tried to defend the prices by buying more. He ran out of money before he ran out of stocks to defend.

BSE President Anand Rathi resigned during this period after allegations that he had misused privileged information from the surveillance system. The whole governance structure of the exchange, not just one broker, was on trial.

More than a fraud, the Ketan Parekh scam was an X-ray of the rot inside India's financial and regulatory systems in 2001.

The aftermath — what changed

The legal aftermath was long and messy. Through its order dated 12 December 2003, SEBI debarred Parekh and his group entities from accessing the securities market for 14 years. SEBI also prohibited 26 entities from trading on his behalf when fresh evidence surfaced in 2009. He was convicted in 2008 for an earlier 1992 transaction with Canara Bank, getting a one-year sentence. He was convicted again in March 2014 by a special CBI court for cheating, this time getting two years rigorous imprisonment.

The structural aftermath was where the scam actually mattered. SEBI used the political opening to push through reforms that had been blocked for years.

The most important changes were three:

Badla was banned. Badla was the carry-forward financing system that allowed brokers to roll positions over indefinitely without taking delivery. It was the leverage rail that made manipulations like Parekh's possible. SEBI's J. R. Varma committee approved the ban on 14 March 2001, and badla died on 2 July 2001.

Rolling settlement became universal. Every stock moved to T+5 rolling settlement from January 2002, eventually compressing further to T+2, T+1, and now intraday for some segments. Open positions had to be settled, not rolled forever.

Circular trading was explicitly outlawed under the SEBI Prohibition of Fraudulent and Unfair Trade Practices regulations. Surveillance systems at the exchanges were upgraded to flag matched trades between connected entities in near-real time.

If you trade today and you take delivery in two days, settle to your demat, can't roll forever, and are watched by exchange surveillance algorithms, you're trading inside the post-Parekh system. That's the legacy.

The 2025 epilogue — he's back

Here's the part most case-study articles miss. In January 2025, SEBI passed an interim order-cum-show-cause notice in a fresh matter. Despite being banned from the markets, Ketan Parekh was, per SEBI's prima-facie findings, running a sophisticated front-running operation with a Singapore-based trader named Rohit Salgaocar. SEBI impounded ₹65.77 crore in alleged unlawful gains and issued the order against 22 entities.

The mechanic was different from the K-10 playbook. Salgaocar had access to advance information about the trades a large US-based foreign portfolio investor (the "Big Client") was about to execute. SEBI alleged that Salgaocar passed this non-public information to Parekh, who then used it to take positions ahead of the Big Client's orders and profit from the predictable price impact.

Per the order, Salgaocar told SEBI that around 90% of the Big Client's trades he handled were routed through Nuvama Wealth Management and Motilal Oswal Financial Services, and that around 90% of those were being fulfilled through Ketan Parekh. SEBI's allegation was that this access to impending trade information was then encashed by routing it to Parekh for front-running.

The takeaway isn't about a specific person. It's about the pattern.

Parekh was debarred in 2003, prohibited again in 2009 when 26 entities were found trading on his behalf, convicted in 2008 and 2014, and was prima-facie still finding ways back into the market through proxies, encrypted chats, and offshore intermediaries. Habitual offenders don't reform; they re-route. Every retail investor should internalise that as a structural feature of the market, not a one-off story.

What retail investors should actually take away

Reading about a 24-year-old scam is interesting. Acting on what it teaches is the point. Three things every retail investor in India should walk away with:

1. If a stock's price is moving faster than its business, somebody is moving it.

Real fundamentals like earnings, cash flow, and market share change in single-digit and low-double-digit percentages over a year. They don't 30x in 18 months. Whenever you see a chart that does, the question isn't "why is it going up?" The question is "who is pushing it up, and why?"

2. Tips, recommendations, and "hot stocks" are how the public gets used as exit liquidity.

The K-10 stocks were the most-recommended scrips on television in 1999-2000. The pundits weren't necessarily lying. Many believed the dot-com story themselves. They were just downstream of the rigging.

By the time a stock makes it onto a retail-facing recommendation list, somebody is already loaded up and looking for someone to sell to.

3. Read the shareholding pattern before you read the price chart.

Concentrated holdings, high promoter pledging, sudden volume spikes, low free float. These are signals you can check in five minutes on the BSE/NSE filings page or any decent screener.

They don't tell you a stock is rigged. They tell you a stock could be rigged. That difference is everything.