How to trade CBA - CommBank shares

If you're looking to trade CBA - Commonwealth Bank of Australia - the first thing to know is that IG Markets gives you two distinct routes: CFD trading or direct share investing. Both are available to Australian clients through IG Australia Pty Ltd, which holds ASIC AFSL 515106. The direct share account offers $0 commission on domestic shares and ETFs, while the CFD route lets you speculate on price moves with leverage up to 1:30 for major forex pairs, though share CFDs fall under ASIC's 5:1 cap.

CBA is the heavyweight of the ASX. It's one of the Big Four banks, a core blue-chip holding for countless Australian investors, and a regular dividend payer with franked income. It's also a low-volatility stock, which makes it a different trading proposition compared to miners or tech names. You'll find it in the S&P/ASX 200 and All Ordinaries indices, and it's one of the most widely owned bank stocks in the country.

What moves CBA's price

CBA's share price responds to a handful of forces that are worth knowing before you put money on the line.

Interest rates are the big one. As a bank, CBA's net interest margin - the difference between what it pays depositors and charges borrowers - shifts with the RBA cash rate. When rates rise, bank margins often expand, which tends to support the share price. When cuts loom, the market prices in thinner margins.

The housing market matters just as much. CBA is Australia's largest home lender, so auction clearance rates, property price growth, and household debt levels all flow into how traders view the stock. A hot property market typically reads well for CBA; a cooling one raises questions about loan book quality.

Then there's the dividend angle. CBA's franking credits make it a favourite for income investors and SMSFs, and the yield sits in the mid-to-high tier among ASX banks. When the dividend outlook strengthens or weakens, the share price tends to follow. That's why earnings season and the bank's half-yearly updates are such closely watched events.

CFD or share trading

IG Australia offers both CFD trading and share trading, and they're genuinely different products. Here's the breakdown.

The $0 commission on the share trading account is a standout for anyone building a CBA position gradually. You can buy in smaller parcels without eating into your return with brokerage. CFD trading, by contrast, builds its cost into the spread.

What you might not realise is that CBA CFDs give you access to the same price action with a fraction of the capital, but ASIC's intervention order caps retail leverage on shares at 5:1. That means a 20% adverse move wipes out your margin entirely. The regulator also requires negative balance protection, so you can't lose more than your account holds.

Costs and spreads to expect

IG's pricing on CBA differs depending on which account you use. The key numbers are straightforward.

• Share trading: $0 commission on ASX shares and ETFs, so buying CBA costs nothing in brokerage.
• CFD trading: costs are built into the spread, which varies with market conditions and your account tier.
• Funding: AUD is the base currency for Australian clients, with USD also commonly supported.
• Minimum deposit: A$100 by card, Apple Pay, or PayPal; A$10 via BPAY; A$450 for EFT with proof of payment.

There's no deposit bonus at IG - ASIC's rules prohibit inducements like trading credits and rebates for retail clients. The broker also offers a demo account, which is the smart way to test both platforms before committing real money.

ASIC rules that shape your trading

Australia regulates CFD trading under ASIC's product intervention order, which applies to all retail clients. The rules cap leverage at 30:1 for major forex, 20:1 for minor forex and major indices, 10:1 for commodities and minor indices, 5:1 for shares, and 2:1 for crypto. Margin close-out protection and negative balance protection are mandatory.

IG Australia operates under AFSL 515106, and the ASIC licence covers OTC derivatives dealing, securities dealing, custodial services, and general financial product advice. That's a fuller licence than many international brokers hold, and it means IG is directly answerable to the local regulator for how it treats Australian clients.

What ASIC doesn't do is guarantee you make money. The regulator's own warnings are blunt: CFDs are high-risk products, and the protections reduce but don't eliminate the chance of rapid account depletion. The rules ban things like trading credits and free gifts, but they can't protect you from a badly sized position.

Platforms for trading CBA

You're not short on choice when it comes to running your CBA trades. IG offers several platforms, and there's no platform that's right for everyone.

There's no MT5 available, which is worth knowing if you're an MT5 specialist. The IG web platform is the easiest starting point for CBA trading - it has everything in one place, from the order ticket to dividend schedules. TradingView fans will feel at home with the native integration, which is unusual among brokers and genuinely useful for charting CBA's price action.

Dividends and corporate actions

CBA's dividend is a big part of why people hold the stock, and how it's handled depends on your account type.

If you hold CBA shares directly, dividends land in your account as cash, and franking credits come with them. You'll get the full benefit of the imputation system, which is a meaningful tax advantage for Australian residents.

If you trade CBA CFDs, the treatment is different but fair. When the stock goes ex-dividend, IG adjusts your account to reflect the dividend. Long CFD holders receive a cash adjustment; short CFD holders have the equivalent amount deducted. This keeps the economic outcome roughly neutral, but it's worth knowing that the adjustment doesn't come with franking credits.

Where the broker falls short

No broker is perfect, and there are a few things to factor in before opening an account.

The leverage caps are the most obvious limitation. If you're used to offshore brokers offering 1:100 on indices, the ASIC caps will feel restrictive. That's a feature of the Australian regulatory regime rather than an IG quirk - every ASIC-licensed CFD issuer works under the same rules. The 5:1 cap on shares means you need to think in terms of 20% move wiping your margin, which is aggressive risk management by any standard.

The minimum deposit structure has its own nuances. The A$100 minimum via card or PayPal is reasonably accessible, but the BPAY route starts at just A$10, while EFT requires A$450 and proof of payment. If you're planning to fund with a bank transfer, the higher threshold might come as a surprise.

Then there's the product range on the share account. While IG advertises over 17,000 markets including forex, indices, shares, commodities, and cryptocurrencies, the $0 commission applies to Australian shares and ETFs specifically. International share trading may carry different fees, and the cryptocurrency offering operates under the 2:1 leverage cap.

Should you use IG for CBA?

The honest answer is that it depends on how you want to trade CBA and what you're optimising for.

Reasonable ifyou want low-cost access to CBA shares with the option to trade CFDs from the same account. The $0 commission on ASX shares makes regular investing in CBA genuinely cheap. The ASIC regulation adds a layer of consumer protection that offshore brokers can't match, including negative balance protection and mandatory risk warnings. IG's 51 years in the business and LSE listing via IG Group also count for something when you're choosing who holds your money.

Unreasonable ifyou're specifically after high leverage on share CFDs. The 5:1 cap is tight, and traders who want meaningful leverage on bank stocks will find it restrictive. If that's your style, you'd be better served by a broker with stronger regulation in a jurisdiction that allows higher retail leverage, though you'd be trading outside the ASIC framework and giving up the local protections. Similarly, if you want MT5 specifically, IG doesn't offer it - that's a hard constraint, not a preference thing.

What to check before funding your account

Before you transfer money and take that first CBA position, there are a few practical checks worth running.

First, work out which account type matches your approach. The share account is for building a position, enjoying dividends, and benefitting from franking credits. The CFD account is for short-term trading, going short, and using leverage. They're different products with different costs, and switching between them later involves moving money around.

Second, confirm your funding route. Card and PayPal are the simplest with a A$100 minimum, but if you're planning a larger deposit, the EFT route with its A$450 minimum and proof-of-payment requirement needs a bit more organisation. BPAY is the smallest entry point at A$10 but may not suit a serious trading account.

Third, check the margin requirements for CBA CFDs before you open a position. At 5:1 leverage, a $10,000 position needs $2,000 of margin. That's a clear enough number, but it's worth calculating the worst-case scenario too: a 20% adverse move would eliminate your margin entirely.

Fourth, decide whether you need the demo account first. It's available, it's free, and it's the sensible way to test both the share trading and CFD interfaces without risking capital. The IG web platform and the various charting options all have slightly different learning curves.

Your tax treatment matters more than most traders realise. If you're trading CBA CFDs regularly, the ATO will likely view your profits as income, which means full marginal tax rates rather than the 50% CGT discount that applies to shares held over 12 months. That difference can be substantial, so it's worth understanding which camp you fall into before you commit to a strategy.