BUZZ-Polaris Industries Inc: To buy Transamerican Auto Parts for $665 mln
** All-terrain vehicle maker's stock up as much as 3.7 pct at $76.76; biggest pct gain in more than 20 days
** Co says to buy off-road SUV accessories maker Transamerican Auto Parts Co for about $665 mln
** Says deal to extend its presence in aftermarket accessories and attract new consumers to its existing brands, including Polaris Ranger and Sportsman ATVs
** More than 280,000 shares traded, 0.2x 30-day moving avg
** Up to Tuesday's close, stock had fallen about 14 pct YTD
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