UPDATE 1-SocGen says Q2 net income to be slightly positive

* Says net banking income to have 1.3 billion euro hit

* Says cost of risk comparable to its level in Q1

* Tier one and core tier one ratios close to March 31 levels

* Q2 results to be published on Aug. 5

* Shares down 1.5 pct

(Adds detail)

PARIS, July 6 (Reuters) - Societe Generale (SOGN.PA) expects to post a small second-quarter net profit helped by its corporate and investment banking division, the French bank said in a statement on Monday.

The bank said net banking income would be hit by a negative impact of 1.3 billion euros resulting from credit default swaps used to hedge its loan portfolio and debt instruments used by the group.

The cost of risk is expected to reach a level comparable to the first quarter, SocGen added.