For about three decades, much of Asean has experienced strong growth driven by exports, demographics and growing middle-class wealth. But as we enter a new year, only one thing is certain: Forecasting is difficult. Despite the volatility and uncertainty ahead, the economic "basics" of population growth and urbanisation that have driven Asean economic growth in recent years remain the big trends this year. For companies looking for growth, perhaps it is most critical in uncertain times like these to go back to the basics, but with a twist.

Targeting Asean is a logical and practical move for businesses. The region has a population of around 626 million people and is the third- largest combined market in Asia. The 10-nation region is expected to remain resilient, with emerging South-east Asian economies growing at approximately 5 per cent to 7 per cent. Indonesia and the Philippines also top many economists' 2017 winners list for their domestically sourced growth.

However, even as Asean becomes increasingly less vulnerable to external shocks, intra-regional trade, which is largely constant at about a quarter of total bloc trade, will not be able to cushion businesses against potentially slowing growth in the United States, European Union and China. This means that targeting Asean markets with a growing consumer base may not be enough. While sticking to the basics, businesses have to consider a bigger playing field and doing things slightly differently.

Instead of focusing on Asean, businesses can look at the expanded region of Asean and South Asia, which offers access to almost one-third of the world's population. According to the World Bank, about one million people enter South Asia's workforce every month. By 2030, Asean and South Asia will be home to more than one-fourth of the world's working adults.

South Asia and South-east Asia's trade has also grown from US$4 billion in 1990 to US$90 billion (S$127 billion) in 2013, according to the Asian Development Bank (ADB). In the same period, South-east Asia's share of South Asian trade rose only slightly from 11 per cent to 12 per cent, while South Asia's share of South-east Asian trade doubled from 2 per cent to 4 per cent. This modest trend suggests that there's room for further growth.

Companies in Asean tend to do more business with other East Asian or South-east Asian countries and shy away from South Asian markets because of their lack of familiarity, experience and contacts.

In an uncertain business world, while we continue with our business in the tried and tested areas, we should also explore new openings when they present themselves.

For a start, with Indian Prime Minister Narendra Modi's pro-business reforms and Sri Lankan President Maithripala Sirisena implementing policies to make it easier for firms to operate, South Asia is becoming increasingly business friendly. Bangladesh's policy reforms in recent years have also created a more open and competitive environment.

In addition, the region as a whole offers businesses in Asean and global manufacturers an alternative market as costs rise in East Asia and South-east Asia. Minimum wages in South Asia are among the lowest globally. For a minimum monthly salary of about US$150 in India, and around US$70 in Bangladesh, Nepal and Sri Lanka, businesses get access to a largely English-speaking and literate labour force.

The expected investment flows to South Asia and South-east Asia also present new prospects as China plans to revive an ancient trading route in the One Belt, One Road initiative that stretches from Asia to Europe. Increased fund flows from China could help both regions adapt to potentially increased trade protectionism, a situation that even the rising US dollar may not be able to counter.

As businesses in Asean face slowing exports and rising production costs, including South Asia in a business strategy will generate longer-term benefits.

There are many opportunities in the ties between Asean and South Asian markets.

Increased business exchanges will call for greater connectivity led by physical and financing infrastructure, which will present enormous gains to Asean and South Asia. Better transportation and infrastructure networks will make it easier to engage in cross-border business. I also advocate an increase in public-private partnerships in the development of infrastructure links. According to ADB, an estimated investment of US$73.1 billion is needed for projects specific to South-east Asia and South Asia connectivity. For wider Asia, ADB forecasts US$8 trillion is needed in the decade leading up to 2020 to plug its infrastructure deficit.

Similarly, there are opportunities for public-private collaboration in financing to encourage businesses and entrepreneurs to "look South". Government support to strengthen and integrate financial markets, and efforts to ease restrictions to fund flow are needed. There are also increasing demands for the financial system to improve access to credit for small and medium-sized enterprises (SMEs). Focus on the development of local and regional bond markets will offer an alternative option to business finance for SMEs and enhance the integration of South and South-east Asian capital markets.

Finally, there are ties in the way companies will finance themselves. For example, for many Indian businesses in need of funding, raising debt overseas in the form of rupee-denominated masala bonds carries almost no foreign-currency risk. As the central bank in India encourages the use of masala bonds to help fund the economy's growth, Singapore is well placed for these issues. Over 80 per cent of listed offshore bonds by Indian issuers are on the Singapore Exchange, raising about US$66 billion.

In closing, 2017 promises to be an unpredictable year. But businesses can thrive by exploiting the strong opportunities in Asean and South Asia. The growth created by over 2.4 billion people working to improve their lives is too strong to be held back. Capturing this growth requires agility, new connections and, for many firms, finding opportunities geographically closer to home.

• The writer is the CEO of Standard Chartered Bank's Asean and South Asia region and CEO of commercial and private banking globally.
  SEA View is a weekly column on South-east Asian affairs.