Six companies spanning technology, dairy, pharmaceuticals and energy have filed to list on the stock exchange this year, the busiest IPO pipeline in nearly a decade after the market's record-breaking rally revived issuer confidence.

Bankers say the queue reflects both improved valuations and a broadening retail investor base, with new account openings at brokerages running at triple the pace of two years ago.

Market veterans advise first-time IPO investors to read prospectuses rather than chase listing-day pops, noting that recent debuts have split evenly between strong gains and below-offer performances.