Common Mistakes Made by New Investors

Investing is the rare discipline where the most expensive lessons are also the most predictable. The same beginner mistakes have been repeated in every market in every decade, including Nepal's. The good news: because they're predictable, they're avoidable. This article catalogues the ten most common — what each looks like, why it happens, and the specific habit that prevents it.

1. Buying on tips, not on thesis

The pattern: 'My cousin's friend said this stock will double in three months.' You buy without ever looking at the company's quarterly. Three months later it's down 20% and the cousin's friend has gone silent.

The fix: never buy a stock you can't write a 5-sentence thesis about — what the company does, why it will grow, why the current price is reasonable, what would prove you wrong, and the time horizon. If you can't write all five, you don't yet own a position; you own a coin flip.

2. Confusing price with value

A NPR 100 stock isn't cheap; a NPR 5,000 stock isn't expensive. Share price is an arbitrary number set by how many shares the company chose to issue. Two stocks at NPR 500 can have wildly different P/E, P/B, ROE, and dividend yield — and any of those tell you more about value than the headline price.

The fix: never look at price without looking at one valuation metric in the same glance. Most platforms show P/E and P/B alongside price. Train the habit.

3. Concentrating in one sector

The portfolio that holds eight commercial banks is not a diversified portfolio. When NRB tweaks the bank rate or tightens provisioning, all eight move together. The same applies to portfolios that are eight hydropower stocks or eight microfinances.

The fix: even with NPR 100,000, you can hold 4–6 stocks spread across genuinely uncorrelated sectors — a commercial bank, a hydropower, a non-life insurance, a microfinance, a mutual fund. The correlations across sectors are much lower than within a sector.

4. Averaging down without a fresh thesis

The pattern: bought at 500, it falls to 400, you buy more 'to lower your average'. It falls to 320, you buy more. It falls to 240, you've sunk most of your capital into a falling stock that you originally only meant to take a small position in.

The fix: averaging down is fine — but only if the thesis is verifiably stronger at the lower price, not just because the price fell. Ask: 'If I had no position, would I buy this stock today at this price?' If the honest answer is no, you shouldn't be adding either.

5. Selling winners, holding losers

Loss aversion is hardwired: selling a winner feels good (booking a gain), selling a loser feels bad (admitting a mistake). Repeated, this habit produces a portfolio of accumulated losers — exactly the opposite of what compounding requires.

The fix: review your portfolio quarterly with a single question per stock: 'Would I buy this today?' Winners that still meet your buying criteria stay. Losers that don't — sell. Your portfolio should look forward, not backward.

6. Trading on margin too early

Brokers offer margin facilities. The leverage is tempting — 'I can buy twice as much with the same capital.' What it really means: a 10% move against you wipes out 20% of your equity, and the broker can liquidate at the worst moment.

The fix: don't use margin until you've been through a full bear cycle on your own capital. The discipline of survival without leverage is the foundation everything else is built on.

7. Ignoring transaction costs and capital gains tax

A trader who flips a NPR 10,000 position twice a week looks busy but might be flat-to-down after fees alone. Broker commission, SEBON fee, DP fees, and capital gains tax stack up — particularly painful on small trades.

The fix: think in round-trip terms. Estimate fees on the buy and sell before you enter. If the expected price move doesn't comfortably exceed the round-trip cost, the trade isn't worth doing. And remember: holding past 365 days reduces your capital gains tax from 5% (short-term) to 7.5% on individuals — actually a curiosity of Nepal's tax structure that subtly discourages day trading.

8. Chasing IPO list-day pops without a plan

Nepali IPOs typically list well above issue price, and the day-one frenzy is well-known. The pattern: retail buys on day one in panic-FOMO, holds for a few days, and either sells at a loss as the stock retraces or holds for years as the company's true value catches up to the issue-day euphoria.

The fix: have a rule for IPO listings. Either you have a fundamental thesis and intend to hold long-term, or you're trading the pop with a defined exit — both legitimate, but pick one before you buy, not after.

9. Reacting to noise as if it were signal

Every day brings news: NRB statements, sector circulars, corporate disclosures, geopolitical events, rumours. Most of it is noise. A small subset is signal. The beginner reacts to all of it; the experienced investor filters ruthlessly.

The fix: ask, before reacting, whether this news changes the long-term cash flow of the company. If yes, react. If it's a one-day sentiment ripple, ignore. The discipline of doing less is one of the highest-return skills you can develop.

10. No journal, no learning

Without a record of your decisions and reasoning, every trade is the first trade. You repeat the same mistakes because you don't remember making them. You forget the trades that worked and how they worked.

The fix: keep a simple journal. For every position: date, ticker, entry price, thesis (the 5 sentences), invalidation point, target. On exit: actual result, what worked, what didn't, what you'd do differently. Read it monthly. The compounding is invisible at first, then suddenly enormous.

The meta-mistake

The biggest mistake of all is treating investing as something other than a learned skill. It is exactly a learned skill — like programming, like writing, like medicine. Beginners are bad at it. Practitioners get better with deliberate practice over years. There is no shortcut, and people who promise one are selling something.

Pick three of these mistakes that resonate hardest, build the corresponding habits, and revisit this list in six months. You'll find others to add. That's growth — and it's worth far more than any single trade.