What Is the Cobra Effect?

Imagine you are offered a reward for catching snakes in your city. The intention is simple: reduce the snake population.

People start catching snakes and collecting the reward. The problem appears to be getting solved.

Then something unexpected happens. Some people begin breeding snakes so they can catch more of them and earn more rewards.

The incentive has worked exactly as designed. But the outcome is the opposite of what was intended.

This is known as the Cobra Effect — a situation where an incentive created to solve a problem ends up encouraging behaviour that makes the problem worse.

The idea has an important place in behavioural finance because financial markets are full of incentives. CEOs are rewarded for revenue growth. Fund managers may be judged against benchmarks. Employees may receive bonuses for hitting quarterly targets. Investors often reward companies that deliver rapid earnings or customer growth.

The problem is that people naturally optimise for what is measured and rewarded.

And sometimes, what gets rewarded is not the same as what creates long-term value.

The YES Bank crisis offers a powerful example of what can happen when aggressive growth becomes more important than the quality and sustainability of that growth.

YES Bank: When Growth Became the Goal

During the period leading up to its crisis, YES Bank positioned itself as one of India's fastest-growing private-sector banks.

Its advances grew dramatically — from around ₹98,210 crore in FY2016 to ₹241,500 crore in FY2019. At the same time, its reported gross NPA ratio remained relatively low, at just 0.76% in FY2016 and 3.22% in FY2019.

On the surface, the numbers looked impressive.

A rapidly expanding loan book suggested strong demand. A relatively low NPA ratio suggested manageable credit risk. The combination was attractive to investors looking for a high-growth financial institution.

But banking is not simply about how much money a bank lends.

It is about whom it lends to, how much risk it takes, whether borrowers can repay, and whether the bank has adequately recognised that risk.

This distinction became critical.

By FY2020, YES Bank's gross NPAs had surged to 16.80%, while its advances had fallen to ₹171,443 crore. The bank also reported a substantial loss for the year.

The deterioration was not merely a bad quarter. It exposed the consequences of years of aggressive lending and inadequate recognition of stressed assets.

In March 2020, the Reserve Bank of India placed YES Bank under a moratorium and subsequently implemented a reconstruction scheme, with State Bank of India participating as the investor bank. The RBI cited the bank's rapidly deteriorating financial position, including liquidity and capital concerns, as the reason for intervention.

Where Does the Cobra Effect Come In?

The important lesson is not simply that YES Bank took excessive risks.

The deeper lesson is about incentives.

A business that rewards employees and management primarily for loan growth, market share and short-term financial performance can unintentionally encourage behaviour that prioritises those metrics over the underlying quality of the business.

Consider a simplified example.

Suppose two banks each have ₹1 lakh crore in loans.

Bank A grows its loan book by 25% but lends conservatively, carefully assessing borrowers and accepting that some opportunities will be rejected.

Bank B grows by 40% by aggressively lending to sectors and borrowers offering higher potential returns but carrying greater credit risk.

If the primary performance metric is loan growth, Bank B looks like the winner.

But if some of those loans eventually turn bad, the picture changes dramatically.

This is the essence of the Cobra Effect in finance.

The organisation becomes extremely good at achieving the metric — without necessarily achieving the underlying objective.

Growth becomes the goal rather than a means to create sustainable shareholder value.

When Numbers Hide the Real Risk

This is where behavioural finance becomes particularly relevant.

Investors often rely on easily observable numbers:

• Revenue growth
• Loan growth
• Profit growth
• Market share
• Customer additions
• Earnings per share
• Return on equity

These metrics are useful. But they can become dangerous when viewed in isolation.

A company can grow rapidly while simultaneously becoming more fragile.

In banking, for example, rapid loan growth can be accompanied by rising credit risk. If weak borrowers are continuously refinanced or stressed assets are not recognised promptly, reported financial performance may appear healthier than the underlying economics.

The RBI's Asset Quality Review, launched from April 2015, was specifically intended to uncover previously masked stress in banks' balance sheets and improve recognition of bad loans.

The broader lesson for investors is simple:

Don't just ask how fast a company is growing. Ask what is driving the growth.

The Investor Behaviour Trap

There is another layer to the Cobra Effect: investor psychology.

Investors love growth stories.

A company that consistently reports 30% or 40% growth attracts attention. Analysts raise earnings estimates. Media coverage increases. The share price may respond positively.

This creates a feedback loop:

Strong growth → higher investor expectations → pressure to maintain growth → greater risk-taking → apparently stronger performance → even higher expectations.

Eventually, maintaining the growth rate itself can become the objective.

This is closely connected to several behavioural finance concepts, including recency bias, confirmation bias and herding.

If investors have already decided that a company is a growth story, they may focus heavily on information that confirms that belief and overlook warning signs.

The result can be dangerous.

A high-growth company is not necessarily a high-quality company.

And a low NPA ratio, high ROE or rising earnings number does not automatically mean that the underlying risk is low.

What Investors Can Learn from the Cobra Effect

The YES Bank episode provides several important lessons for investors.

1. Look beyond headline growth

Growth is valuable only when it creates sustainable economic value.

When evaluating a company, ask whether growth is being funded by stronger fundamentals, better productivity and genuine demand — or by increasing leverage and risk-taking.

2. Understand how management is incentivised

One of the most overlooked aspects of fundamental analysis is the incentive structure.

Are executives rewarded for quarterly earnings or long-term value creation?

Are bonuses linked to revenue alone, or also to profitability, cash flow, asset quality and risk-adjusted returns?

Corporate governance and management incentives can tell investors a great deal about how a company may behave when conditions become difficult.

3. Examine the quality of earnings

Reported profit is only one part of the story.

Investors should examine cash flows, provisions, debt levels, working capital, asset quality and other indicators relevant to the sector.

In financial companies, this means paying particular attention to credit quality, provisioning, capital adequacy and concentration of exposure.

4. Question unusually impressive numbers

Exceptional growth is not automatically a red flag.

But it deserves investigation.

If a company is growing dramatically faster than its industry, investors should ask: Why?

Sometimes the answer is superior execution.

Sometimes it is a temporary opportunity.

And sometimes the company is simply taking more risk than competitors.

Sustainable Growth Is Better Than Fast Growth

The Cobra Effect is ultimately a lesson about unintended consequences.

An incentive can change behaviour. And when the incentive is poorly designed, intelligent people can end up optimising the wrong thing.

This applies far beyond banking.

A sales team rewarded only for revenue may prioritise volume over profitability. A fund manager judged only on short-term returns may take excessive risk. A company obsessed with customer acquisition may spend heavily without creating profitable customers.

The same principle applies to investors.

Don't confuse activity with progress, growth with value, or performance with sustainability.

The YES Bank crisis demonstrates why numbers must always be read in context. The bank's rapid expansion and apparently manageable asset-quality metrics eventually gave way to a sharp recognition of stress, culminating in regulatory intervention in 2020.

For investors, the takeaway is straightforward:

The best businesses are not necessarily those that grow the fastest. They are those that can grow without compromising the fundamentals that make the growth sustainable.

That is the real lesson of the Cobra Effect in behavioural finance.

Before investing in a company, don't just ask, "How fast is it growing?"

Ask the more important question:

"What incentives are driving that growth — and what could happen if those incentives go too far?"

That question can reveal risks that a headline growth number never will.

Build a Portfolio That Looks Beyond the Headlines

Investment decisions should not be based on a single metric, a recent winner or an impressive growth story. A holistic portfolio review can help identify concentration risks, hidden exposures and whether your investments are aligned with your long-term goals.

Get your portfolio reviewed and understand whether your investments are built for sustainable wealth creation — not just short-term performance.

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