Here's what you should do if the oil stock falls further.Shares of ExxonMobil (XOM -3.63%) were falling this morning and were down 3.1% as of 11:50 a.m. ET Tuesday, wiping out all of their gains and some from the previous day. Although the oil and gas stock typically mirrors movements in crude oil prices, there's another reason why ExxonMobil was falling today.Oil price volatility is hurting investor sentimentCrude oil prices tumbled Tuesday morning after OPEC cut its global oil demand forecast for 2024 to ...