Education and Communications Is HX stock a good buy? Is APTX stock a buy? Aptinyx Inc. - Buy. Zacks' proprietary data indicates that Aptinyx Inc. is currently rated as a Zacks Rank 2 and we are expecting an above average return from the APTX shares relative to the market in the next few months. Related Posts:Does aptX make a difference?Is Zacks good for long term?Is ZS stock a good buy?How accurate is Zacks Research?