Let's keep in mind that Exxon and Apple are the world's most valuable publicly traded companies. There are a number of state-owned 0&G companies that are more valuable than both. I believe I read that the market cap, if it were to go public, of Saudi Aramco would be in the 5-10 trillion dollar range.
In other words, Apple drops below Exxon.
This is not news :/... Hacker or otherwise. The volatility of a stock is not interesting. The long term implications of this inversion are essentially moot.