Sept 21 (Reuters) - Industrial Alliance Insurance And Financial Services Inc IAG.TO :
* iA financial group expands its car dealer business to the us
* Says deal for US$135 million
* Says deal is expected to be modestly accretive to earnings in 2018, to contribute $0.05 per share in 2019
* Says acquisition will be financed from cash on hand, reduce co's solvency ratio by about 8 percentage points
* Says signed agreement to buy shares of privately-owned, us-based dealers assurance company, southwest reinsure