Buying a stock because it was trending on TikTok is how most people start. It's also how most people lose their first RM1,000. By the time a ticker is everywhere on your feed, the early money has usually left the building and you're buying their exit.

Currency is the thing Malaysians forget. Your more helpful hints are priced in US dollars, so when the ringgit moves, your result moves with it, sometimes in your favour and sometimes not. A stock can rise 8% and still leave you flat in ringgit terms if the dollar slides. Check what your broker charges to convert funds, too. A fee of half a percent each way sounds tiny until you're buying and selling often.
The time difference catches people off guard. The US market opens around 9:30 pm Malaysian time, give or take an hour depending on daylight saving, and the first thirty minutes are chaos. Prices jump, spreads widen, and half the orders placed in that window are placed by people who are still half asleep or half distracted. Wait a bit. Nobody ever got rich from the first ninety seconds.
Dividends come with a catch. US companies withhold tax on dividends paid to foreign investors, usually 15% to 30% depending on the paperwork you've filed with your broker. Look for a W-8BEN form during signup. Skipping it can mean the higher rate, which quietly shaves your income.
Owning one stock is a gamble with extra steps. I knew a guy who put his whole account into a single electric vehicle company because he liked the cars. He liked them less after earnings. If picking individual names appeals to you, spread the money around, or let a broad index fund handle the heavy lifting while you play with a small slice.
Fractional shares are worth knowing about. You don't need to afford a full share of Amazon or Nvidia, so a few hundred ringgit can buy exposure to companies that once felt out of reach. It makes diversifying easier, and it removes the excuse of waiting until you have more.
Check where your broker is regulated and where your holdings are kept. Some Malaysian-friendly platforms are US-registered with SIPC coverage, others are offshore intermediaries. The difference matters if something breaks. Read how they hold your shares, and whether they're in your name or pooled.
Selling at the first red day is the opposite mistake, and it's just as common. Stocks drop 3% for no reason at all. Plan an exit before you buy, write it down, and try not to rewrite it at 1 am.
Earnings season deserves respect. A company can report great numbers and still fall 10% because the market wanted better. Holding a big position through the announcement is a coin toss with a nicer outfit.