It happened once before, in August, but that was due to a stock market collapse that left both Exxon and Apple well below their usual share price. This time, however, it would seem that Apple’s Q1 earnings call yesterday has led to a fresh spike on the stock market and what do you know? Apple is once again the most valuable publicly traded company in the world, with a market cap of $414.83 billion](http://finance.yahoo.com/echarts?s=AAPL+Interactive#chart2:symbol=aapl;range=1m;compare=xom;indicator=volume;charttype=line;crosshair=on;ohlcvalues=0;logscale=on;source=undefined).