LinkedIn Corp. (NYSE: LNKD) shares rose 16.7% to $144.85. The social-network company said Thursday fourth-quarter profit and sales jumped, beating Wall Street estimates. It said profit rose to $11.5 million, or 10 cents a share, from $6.92 million, or six cents a share. Share volume was 422,000, compared to an all-day average of 291,000