Recently, I keep receiving messages from beginners saying they clearly chose the right track, but after holding for half a month, they lost nearly two thousand in fees and couldn't hold on to stop-loss. Just after clearing positions, the sector skyrocketed...

This is a typical case of falling into the rules, rather than a judgment error.

Only focusing on price fluctuations, do you really understand the hidden rules of trading?

Let me expose a few common pitfalls for everyone. Avoiding these might make your investment journey smoother.

First Pitfall: Transaction fees are hidden bloodsuckers.

Many people focus only on profits and losses in trading, but fail to notice that transaction fees are quietly draining their accounts.

Transaction fees are charged based on the amount of each transaction. Even if you profit overall from high-frequency trading in one day, fees might swallow half of your profits.

For example, fully investing in hot stocks, the direction is correct, but after ten trades in three days, nearly a thousand in fees are deducted. When a slight pullback happens, you're forced to stop-loss, and the next day the sector directly hits the limit up; just thinking about this feels awful.

Pitfall Advice:

• Avoid periods of poor liquidity (when the bid-ask spread exceeds 0.5%).

• Reduce ineffective trades; hold a single stock for no less than 3 days.

• When the direction is clear, choose a platform with lower fees or hold for the long term.

Second Pitfall: The stop-loss line is not the level you drew.

Many friends think that buying a stock at 10 yuan and setting a stop-loss at 9 yuan is safe, but if it drops to 9.2 yuan, the system will automatically liquidate the position.

Why?

Because the platform will add slippage costs, the actual transaction price is worse than the stop-loss line you set.

Solution:

• Don't go all-in on a single stock; use 'diversified holdings' to reduce single stock risk.

• Leave enough buffer space for the stop-loss line (at least set it 2% higher than the expected pullback).

• Avoid placing orders at the closing or opening auction to reduce slippage losses.

Third Pitfall: High-frequency trading = self-harm behavior.

The seemingly flexible 'swing trading' hides enormous implicit losses.

Stamp duty and transfer fees are calculated based on the number of trades. Even if you earn 20% over a year, if your trading frequency is five times that of others, you may end up underperforming the index.

Remember this:

• Low-frequency layout, high-frequency must lose.

• The more frequently you trade, the higher the friction costs. Don't be fooled by the 'compound interest myth.'

• It's not that you chose the wrong target, but that you didn't calculate the costs clearly.

The market is not afraid of your wrong judgments; it fears you seeing through its 'cost traps.'

Want to make money in the market? Don't just bet on the targets; first, calculate the rules.

If you want to root yourself more steadily in the investment circle, follow me, avoid these pitfalls, and save on tuition fees!