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Does it make sense to trade my GOOGL shares for GOOG and pocket the difference?
To keep it simple, let's say that A shares trade at 500 on average between April 2nd 2014 and April 1st 2015 (one year anniversary), then if C shares trade on average: The payment will be made either in cash or in shares within 90 days. The difficulties come from the fact that the formula is based on an average price over a year, which is not directly tradable, and that the spread is only covered between 1% and 5%. In practice, it is unlikely that the market will attribute a large premium to voting shares considering that Page&Brin keep the majority and any discount of Cs vs As above 2-3% (to include cost of trading + borrowing) will probably trigger some arbitrage which will prevent it to extend too much. But there is no guarantee. FYI here is what the spread has looked like since April 3rd:  * details in the section called "Class C Settlement Agreement" in the S-3 filing