Like Australia, New Zealand is witnessing a trend towards the increasing popularity of debit cards over credit and charge cards. While the main reason is the post-GFC fall in consumer confidence, another reason is the emergence of more debit card products.A report by MWE Consulting showed that, in 2010, the share of purchases on debit rose to 56.4 per cent, from 53.7 per cent two years ago. In the month of December 2010 alone the share of debit purchases rose to 56.0 per cent, from 55.6 per cent in November.The report also highlighted a narrowing in the market share of the two largest card issuers, ANZ National and Bank of New Zealand, with the former losing considerable market share and BNZ emerging as one of the gainers, along with Westpac.ANZ National's market share dwindled to 25.9 per cent in September 2010, from 27.4 per cent two years ago, while BNZ increased its share to 25.6 per cent, from 25.0 per cent. Westpac gained the most, with its share climbing to 23.4 per cent, from 21.9 per cent, while Amex was the biggest loser, down to 7.0 per cent, from 9.3 per cent.The MWE report draws on payments data published by the Reserve Bank of New Zealand.