A technical paper at an entomology conference in Chicago last week galvanised investment interest in a tiny Aussie bio-tech, Bio-Gene Technology (ASX code BGT).

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Bio-Gene has been so far below the radar recently that some days there are no trades in the shares. Last Tuesday, however, 16 million shares changed hands and the BGT price went from 2.4 cents to 6.1c in a matter of hours.

It's the possibility of that sort of quick gain that keeps the punters throwing money at the penny-dreadfuls on the stock market. Profit-taking quickly cut back the gain, but at the time of writing, the shares were

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