Citigroup's decision to maintain a Neutral rating for EVgo indicates that the stock is not expected to outperform or underperform the market in the short term. The lowered price target from $6.20 to $5.10 suggests a potential upside of 17.17% from the current share price, but the stock's recent 0.85% decline indicates that investors may be cautious. The Neutral rating and lowered price target are likely to have a neutral impact on the stock price in the short term.