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The stock market was having a so-so day on Tuesday, with most major indexes hovering near the flatline throughout most of the morning. However, pet insurance provider Trupanion(NASDAQ: TRUP) was a major exception -- as of 11 a.m. EDT, the stock was higher by more than 12%.
Today's move appears to be driven by Trupanion's addition to the S&P SmallCap 600 index, where it will be replacing Ring Energy(NYSEMKT: REI).