What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.

The shares of United Airlines observed a strong rally in recent weeks assisted by pent-up travel demand and declining coronavirus infections. However, the benchmark oil prices have surged by 26% from $75/bbl in early January to $95/bbl at present – weighing on the bottom line of all transportation.
mildly negative