The partnership with Atlantic Aviation is a strategic move for Joby Aviation, as it addresses the critical infrastructure needed for the successful deployment of its air taxi service. This development is likely to be viewed positively by investors as it demonstrates progress towards commercialization. However, the current drop in share price suggests that the market may have already priced in some of the positive news or there may be other factors influencing the stock's performance. Over the short term, the announcement could lead to an uptick in investor confidence and potentially reverse the slight decline in share price.