If I had $2,000 to invest in blue-chip ASX shares, my focus would be on businesses that can remain useful in different economic conditions.
With that in mind, these are three ASX shares I would consider buying this month.

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Commonwealth Bank of Australia (ASX: CBA)
CBA is the first blue-chip ASX share I would consider.
This bank stock regularly trades at a premium to the other major banks, so investors need to be comfortable paying up for quality.
But I think CBA justifies its valuation. What stands out to me is how deeply embedded it is in Australian financial life. It is not just a mortgage lender. It touches transaction accounts, deposits, credit cards, business banking, home loans, merchant services, apps, payments, and financial tools.
That breadth gives it a very strong view of the customer. In banking, that can be a major advantage. Customer relationships, data, funding strength, and trust are all useful when competition is intense. CBA's digital capability also helps keep customers engaged in ways that go beyond a branch network.
There are risks to consider. Bad debts could increase if higher interest rates put more pressure on borrowers, margins can move around, and regulation is always part of the banking sector. But I think CBA is one of the highest-quality financial institutions in the world and well-placed to handle these risks.
Woolworths Group Ltd (ASX: WOW)
Woolworths is the second ASX share I would consider buying.
I like Woolworths because it operates in one of the most repeatable spending categories in the economy.
Households can delay many purchases when budgets are tight. But groceries remain part of the weekly routine. That gives Woolworths a defensive quality that can be useful in a portfolio.
The company is also more than a collection of supermarkets. Its scale gives it purchasing power, supply chain reach, data, loyalty benefits, and the ability to invest in online shopping, store formats, and customer convenience.
I think that is important. Supermarket retailing looks simple from the outside, but execution is demanding. Customers notice prices, freshness, availability, checkout experience, delivery reliability, and promotions. Small differences can influence where they shop.
Woolworths needs to keep working hard on value, service, and trust. Competition from Coles Group Ltd (ASX: COL), Aldi, Costco, and other retailers remains real.
Even so, I think this is the type of blue-chip share that can provide stability when other parts of the market are more volatile.
Goodman Group (ASX: GMG)
Goodman is the third blue-chip ASX share I would consider.
It is often grouped with property companies, but I think that label understates what makes the business interesting.
Goodman owns, develops, and manages industrial property in important global locations. These assets sit close to supply chains, consumers, cities, transport routes, and major economic hubs.
That alone is attractive. Modern businesses need efficient logistics space, and good locations can be hard to replace.
But Goodman's opportunity has also expanded as data centre demand has grown. Cloud computing, artificial intelligence, streaming, cybersecurity, and enterprise software all need physical infrastructure behind them.
Goodman is one of the ASX companies positioned to benefit from that shift.
What I like most is the mix of property discipline and technology-driven demand. This is not just a story about warehouses. It is about land, power, customer relationships, development capability, and the ability to allocate capital into areas where demand is strong.
Foolish takeaway
A $2,000 investment does not need to chase the most speculative opportunity on the market. I think it can make sense to put money into businesses that already have scale, strong customer positions, and reasons to remain important over the next decade.
For investors looking for blue-chip ASX shares, I think these three are worth considering.