Is Borrowing to Invest a Good Idea? A 3-Step Financial Health Check to Assess Risk and Timing

“Lazy Da, can I borrow money to invest?”

This is probably one of the most common questions I get — and honestly, it might be the question I asked myself most often when I was young. The answer has never been a simple “yes” or “no.”

I like to compare “financial leverage” to a car’s turbocharger (Turbo). It’s seductive — it gives you an instant burst of power and a rush of speed you’ve never felt before. But at the same time, it burns through your fuel at a ferocious rate and puts enormous stress on your engine. One wrong move at high speed, and the engine blows up, taking everything with it.

Before we dive into any rules or methods, I want to share a personal story — my own “engine blowout.”

My Personal Confession: The Year I “Graduated” from the Market

When I was in my mid-to-late twenties, before I hit thirty, my head was full of schemes to get rich through investing overnight. The idea was simple: make a lot of money, fast.

I started with warrants (權證, short-term leveraged derivative securities). When the market was good, making NT$200,000–300,000 in a single day was nothing unusual. That kind of feeling inflates your confidence to the extreme — you start thinking you’re the chosen one.

Gradually, greed swallowed me. I was no longer satisfied with that pace of profit. I wanted more, faster. So I turned to futures (期貨) — a world with even higher leverage. I used borrowed money on top of futures’ already high built-in leverage…

The end result: a complete wipeout. I “graduated” from the market.

That failure gave me a deep, visceral understanding of how fast risk can amplify in a leveraged world — far faster and harder than you can imagine. From that point on, I developed a completely different relationship with the word “risk.” That’s exactly why I want to share all of this with you today.

Now, let me walk you through two stories — both similar to mine, but with very different endings.

One Decision, Two Fates: Understanding the Power of Leverage Through Others’ Stories

✅ The Winning Playbook: Engineer Xiao Hua’s Rational Path to Wealth

Here’s what made Xiao Hua (小華) smart.

Cast your mind back to early 2020, when COVID-19 had just broken out and markets were gripped by panic. But Xiao Hua — earning NT$80,000 a month with zero debt — already had NT$300,000 in an emergency fund and had been investing in 0050 (Taiwan’s largest index ETF, tracking the top 50 stocks) for three years. He was no “leek” (韭菜, a slang term for naive retail investors who get harvested by the market).

He saw an opportunity, but didn’t rush in blindly. He ran the numbers carefully, borrowed NT$800,000 from the bank at 1.68% interest, with monthly payments of NT$23,000 — less than 30% of his income. What does that mean? It means even if he took a pay cut, he could still live. That’s the foundation of real confidence.

He put the money into 0050, the ETF he knew best, and set a stop-loss. When the market surged afterward, he netted over NT$300,000 in profit. This wasn’t luck. It was the right person, at the right time, using the right method, doing the right thing.

❌ The Disaster Playbook: Office Worker Xiao Ming’s Leveraged Road to Ruin

The other story is far more painful.

It was 2021 — market highs everywhere, everyone calling themselves a “teenage stock god.” Xiao Ming (小明), earning NT$50,000 a month with a car loan and less than NT$100,000 in emergency savings, got fired up at a dinner party by friends’ overnight-rich stories. In a moment of hot-headed recklessness, he borrowed NT$1,000,000 — at an interest rate of 6.5%.

Do you know how terrifying that is? His total debt repayment burden was 76% of his monthly salary! More than seven-tenths of his paycheck vanished the moment it hit his account. Going out for dinner with friends required serious deliberation. His quality of life was completely destroyed.

Worse, he used that money to buy a “hot tip” stock from a friend — a single stock he understood absolutely nothing about. When the bear market of 2022 arrived, the stock was cut in half. He couldn’t sleep at night. In the end, he panic-sold at the worst possible moment — and “graduated” from the market once again. Final tally: NT$460,000 in losses, plus a mountain of debt to the bank.

This is a textbook tragedy. It stemmed from the wrong person, at the wrong time, using the wrong method, doing the worst possible thing.

Three Financial Health Checks Before You Act: Are You Ready?

After reading those stories, you should understand that the outcome of borrowing to invest is roughly 70% decided before you even click “apply for loan.” Now, set aside your fantasies about profit. Like a surgeon preparing for an operation — honest, unsentimental — complete the following three self-assessments.

✅ Check 1: Can You Still Live Well After Repaying the Loan?

This is the most practical and most important check. Investment opportunities can wait — the market is always there. Your bank statements, however, will not wait for you.

The simplest standard I use to evaluate repayment ability is: “Will this loan’s principal and interest payments affect your current quality of life?”

If you have to cut back on food, skip trips, and skip social dinners just to make payments, the leverage has already seriously compromised your life. That psychological pressure will make you far more likely to make bad investment decisions.

Beyond the subjective sense, the Debt-to-Income Ratio (DTI) — your total monthly debt payments divided by your pre-tax monthly income — is the number you must calculate. I strongly recommend keeping this figure below 30%. That means you still have enough breathing room to handle life’s unexpected surprises.

✅ Check 2: Is Your Safety Net Thick Enough?

I often say investing should never keep you up at night. The net that lets you sleep soundly is your emergency fund.

Before considering any leverage, you must have sitting in a bank account — completely separate from your investments — a reserve covering at least 6 months of all living expenses.

I want to be crystal clear: this money is for life’s unexpected emergencies — a sudden hospitalization, a broken air conditioner that needs replacing. It is not for averaging down on investment losses, and it is absolutely not for repaying loans. If your plan is “if I can’t make payments, I’ll dip into my emergency fund,” then that plan is fundamentally wrong from the very start.

This money’s only purpose is to give you the right to peace of mind. It ensures that in extreme situations — unemployment, market crashes — you won’t be forced by a broken cash flow to sell your precious assets at the absolute lowest point, in tears.

✅ Check 3: Is Your Heart Strong Enough?

Leverage acts like a magnifying glass, ruthlessly amplifying every one of your emotions. When the market rises, you’ll be greedier than everyone else. When it falls, you’ll be more fearful.

That’s why I believe, before considering leveraged investing, you should already have at least 2–3 years of real-world investment experience. Not just how long your account has been open — you must have gone through actual market cycles with your own hard-earned money. You’ve made mistakes, paid tuition to the market, and you know what market pain actually feels like.

You need to run an honest stress test on yourself: imagine your entire portfolio drops 20% in a single month. Would you lie awake, heart pounding, frantically trying to open your trading app to sell everything? Or could you make peace with the situation and tell yourself, “my money didn’t disappear, it just changed into a form I like”? If you’re the former, your psychological profile is not yet strong enough to tame the beast called leverage.

The Toolbox: If You’ve Passed All Three Checks

Great. If you’re confident you’ve cleared all three filters, let’s talk tools.

Part 1: Choose Your Borrowing Channel

Different borrowing channels are like different-caliber weapons — each has its own interest rate, credit limit, and risk profile.

But first, a word of advice for fresh graduates and young professionals: Don’t wait until you need money to introduce yourself to a bank for the first time.

Most young people without assets immediately think of “unsecured personal loans” (信用貸款), but that’s often the option with the worst interest rates. I sincerely recommend building a long-term relationship with one bank early — use it as your primary banking institution. When the bank sees years of steady cash flow from you, you’ll have a far better chance of negotiating favorable terms when you eventually need funds.

Most importantly, you must internalize this from the core: borrowed money is a “liability” that comes with interest. It is never an “asset” you can freely spend.

Part 2: Choose Your Investment Target

When using leverage, forget “explosive power.” Make stability and predictability your only religion.

My top recommendation will always be index ETFs (such as 0050 or VTI). Why? Because when you buy an ETF, you’re betting on the long-term economic development of an entire country or market — not the fate of a single company. This effectively eliminates the most dangerous risk: single-stock risk (things like a company going bankrupt, a CEO scandal, or accounting fraud).

Don’t follow the internet joke of “if in doubt, just all-in.” That’s the greatest disrespect you can show your hard-earned money.

Conversely, crypto, futures, options, and speculative stocks you know nothing about — these should all be on your blacklist. Gambling with borrowed money is the fastest route to financial self-destruction. I’ve walked that road myself, and I sincerely hope you never have to.

Frequently Asked Questions

Lazy Da’s Conclusion

懶大

金融科技新創 CEO | 獨立財務顧問

Borrowing to invest has never been an easy shortcut to financial freedom. It is a comprehensive art form that combines mathematics, psychology, and risk management.

Engrave these three golden principles of leveraging deeply into your mind:

1. Interest spread of at least 3%: Ensure your investment returns reliably outpace your loan interest rate.
2. DTI < 30%: Keep your repayment burden firmly within a comfortable zone.
3. 6 months of emergency funds: This is your last line of defense — the foundation that keeps you standing in any storm.

If you’ve passed all the checks and are ready to take the step, remember my parting words:

Every dollar of that borrowed money must be deployed with a specific target and purpose — into an investment market you’ve already identified.

Never blindly follow someone else’s “hot tips.” I won’t deny that high-profit opportunities exist in the market. But you must clearly understand that all wins and losses ultimately rest 100% on your own shoulders. That sense of responsibility is the most important talisman you carry on the path of leveraged investing.

Borrowing to invest is not gambling. It is an investment technique that requires professional knowledge, financial discipline, and risk awareness. Remember: It’s okay to grow slowly, but you can never afford to lose so badly that you can’t get back up.

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