...A. Note: Will be discussing consolidated results using core performance measures. 1. Unless Co. specifically indicates, comments relate to GAAP data. a. b. Core performance measures are non-GAAP measures used by management to analyze the business. 2. For 4Q20, the largest difference between GAAP and core results stem from restructuring charges, which are primarily non-cash as well as non-cash mark-to-market losses associated with Co.'s currency hedging contracts. B. Mark-to-Market Adjustments: GAAP accounting requires earnings translation hedge contracts and foreign debt settling in future periods to be marked to market, and recorded at current value at the end of each qtr., even though these contracts will not be settled in the current qtr. 1. For GLW, this reduced GAAP earnings in 4Q20 by $63m. a. 2. This mark-to-market accounting has no impact on cash flow. 3. Currency hedges protect Co. economically from FX rate fluctuations and provide higher certainty for earnings and cash flow, its...