* Q3 EPS $0.70 vs est. $0.66

* Corporate finance/restructuring rev jumps 39 pct

* Announces $500 mln share buyback

* Says buyback to add 10 pct to 2010 EPS (Recasts; Adds conference call details, updates share movement)

Nov 4 (Reuters) - Business advisory firm FTI Consulting Inc (FCN.N: Quote, Profile, Research) posted a quarterly profit that topped Wall Street targets as it gained from a surge in restructuring activities at industries hit by the recession, and said it will buy back $500 million in stock.

On a conference call, the company said the proposed buyback would add at least 10 percent to earnings per share in 2010.

FTI Consulting said it expects financial economic cases, which include securities litigation and international commercial arbitration, to ramp up in the fourth quarter and 2010.

Consulting firms, which help companies handle investigations and restructuring, are expected to see a rise in business volume as the credit crisis has increased the probability of investigations, litigation and bankruptcies.

For the third quarter, net income was $37.5 million, or 70 cents a share, compared with $26.3 million, or 48 cents a share, a year ago.