There's one very specific feature of British American Tobacco's (BTI 1.08%) stock that keeps investors interested: the dividend yield. At a time when the S&P 500 index is offering a tiny 1.2% yield and the average consumer staples stock 2.6%, British American Tobacco's yield is a lofty 8.1%."Wow" is a fair response to hearing about that return, but that huge yield comes with risks and long-term income investors need to think about what the future might look like here. Will this company offer such an enviabl ...