(Updated with additional information)NEW YORK ( TheStreet) -- A wealth of healthy buying in recent weeks led a wide variety of blue chips to hit fresh 52-week highs this week. Jim Cramer told the viewers of his "Mad Money" TV show Wednesday the 52-week high list tells us everything we need to know about the market, though it's not the number of companies hitting 52-week highs that's important, it's the number of industries represented on the list. >>Cramer's 'Mad Money' Recap: 52-Week High Breakout He explained that just a month ago, there were only three industries on the list, and they represented people's fears of the market. But today, there's an astounding 25 different industries on the list, a diverse swath of the economy. Ranked by volume, the most heavily-traded stock to hit a fresh 52-week high Thursday was Dow Jones Industrial Average component DuPont ( DD - Get Report). The chemical maker saw its shares rise to $43.46 before closing at $43.38. Shares of insurance firm Ace Limited ( ACE) rose as high as $57.90 before closing at $57.79. Chubb ( CB) shares reached a peak of $57.60 and closed at $57.56. Elsewhere in 52-week highs,
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