Ameriprise Financial ( AMP) gained after the Minneapolis-based financial planning firm beat Wall Street's second-quarter earnings expectations. Net income at Ameriprise actually dropped by 9% to $141 million, or 57 cents a share, down from $155 million, or 63 cents a share a year ago. But excluding charges stemming from the firm's spin-off by American Express, operating earnings climbed 22% to $195 million, or 79 cents a share. On the operating basis, Ameriprise exceeded the Thomson Financial consensus estimate of 77 cents a share. Revenue, which rose 8% to $2.1 billion, also came in ahead of the consensus forecast of $1.92 billion. Shares gained $1.84, or 4.30%, to $44.62. SeaBright Insurance Holdings ( SEAB) dropped after the Seattle-based company reported that second-quarter earnings more than doubled, but revenue fell far short of Wall Street's expectations. The company earned $9.4 million, or 45 cents a share, compared with $4.2 million or 25 cents a share a year ago. Revenue increased 8.8% to $46.9 million. But Wall Street was looking for earnings of 36 cents on revenue of $56.5 million. Revenue from insurance premiums rose 5% to $41.8 million, but the increase was less then Wall Street had expected. The insurer said, "Premiums were tempered by increased competition in all of our regions and by the impact of rate reductions in California.'' Shares fell $2.11, or 14.11%, to $12.84 recently. Affiliated Managers Group ( AMG) gained after the Boston-based asset management company posted a 29% gain in profits and said it would buyback up to 5% of its outstanding stock. AMG earned $78.1 million, or 86 cents a share, up from $26.2 million, or 63 cents a share, a year earlier. Cash earnings, which exclude items such as amortization, rose to $1.30 a share from $1.13 in the same period last year. Analysts polled by Thomson Financial were expecting cash earnings a share of $1.28. Shares were trading up $2.60, or 3%, to $89.37 recently.