The initiation of coverage by BMO Capital with a Market Perform rating suggests a neutral outlook on Piedmont Lithium's stock in the short term. The price target of $20 provides a specific expectation for the stock's future performance but does not strongly suggest a significant upward or downward movement from its current price level. Therefore, the impact on the stock price is likely to be neutral in the short term, as the market absorbs this new analyst coverage and price target.