Tommy Kalikas, right, works with fellow traders on the floor of the New York Stock Exchange. Stock investors have been on a harrowing round trip over the last seven months, but the market may be in a healthier place after it. AP
 Tommy Kalikas, right, works with fellow traders on the floor of the New York Stock Exchange. Stock investors have been on a harrowing round trip over the last seven months, but the market may be in aShow more

Wall Street is back to record highs, but it's a different stock market now