Two Wednesday winners on the exchange were email security specialist Mimecast (NASDAQ: MIME) and bank holding company Trustmark (NASDAQ: TRMK) . The former rose by nearly 8% on the day, with the latter increasing by almost 9%. Both gained on the back of upcoming changes to a set of crucial stock indexes.
After market close on Tuesday S&P Global (NYSE: SPGI) -- the company that owns and manages the S&P suite of indexes -- announced one of its periodic realignments.
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Why Mimecast and Trustmark Shot Higher Today