woocommerce_product_options_stock_fields action-hook . WC 1.0

Usage

add_action( 'woocommerce_product_options_stock_fields', 'action_function_name_340' );
function action_function_name_340(){
	// action...
}

Where the hook is called

do_action( 'woocommerce_product_options_stock_fields' );

Where in WP core the hook is used WooCommerce