Goldman Sachs Group Inc. (NYSE:GS) shares are down on Wednesday as the company faces challenges in managing earnings volatility, following a recent analyst report. The company is set to report fourth-quarter financial results Thursday before market open.Goldman Sachs Earnings ForecastHere are the current analyst estimates for Goldman Sachs fourth quarter, according to data from Benzinga Pro.EPS Estimate: $11.67 (Down from $11.95 YoY)Revenue Estimate: $14.12 billion (Up from $13.87 billion YoY)Valuation: P/E ...