Analyst ratings and price targets can significantly influence a company's stock price. In this case, Goldman Sachs, a highly influential financial institution, has reinstated Targa Resources with a Buy rating and set a price target of $101. This suggests that they believe the company's stock is undervalued and has the potential to reach or exceed this price target. As a result, this news could lead to increased investor confidence and demand for TRGP stock, potentially driving its price up in the short term.