How to add a new taxonomy link to the admin menu

The taxonomy admin page will be handled by WordPress once you register your custom taxonomy.

add_action( 'init', 'create_ticker_taxonomies', 0 );

//create two taxonomies, genres and writers for the post type "book"
function create_ticker_taxonomies() {

  // Add new taxonomy, make it non-hierarchical (like 'tags')
  $labels = array(
    'name' => _x( 'Tickers', 'taxonomy general name' ),
    ...
  );    

  register_taxonomy('ticker',array('post'), array(
    'hierarchical' => false,
    'labels' => $labels,
    'show_ui' => true,
    'query_var' => true,
  ));
}

The full options available to you regardin the taxonomy and its labels can be found on the Codex Page.