In this task, you are given a piece of an article. Your task is to generate a short summary of the text. Try to give the summary in just one sentence.

Q: Girlfriend Material by author Melissa Kantor was chosen this week at the Glenpool High School book of the week.

A: Excess liquidity globally is driving the equity markets.
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Q: Silver Standard Resources Inc. announces today that it has entered into a Purchase and Sale Agreement with subsidiaries of Goldcorp Inc. and Barrick Gold Corporation to purchase 100% of the Marigold mine, a producing gold mine in Nevada, USA for cash consideration of $275 million.

A: Silver Standard Resources Inc. has entered to purchase 100% of the Marigold mine.
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Q: The Montreal Exchange announced today that it has upgraded its SOLA derivative trading platform, improving both trading system performance and order management capacity.

A:
The Montreal Exchange has upgraded its derivative trading platform.
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