BY THE NUMBERS

U.S. stock futures sank Monday after the worst week on Wall Street since January. Bond yields soared as investors braced for the Federal Reserve to increase interest rates later this week following Friday's hotter-than-expected consumer inflation data. The S&P 500 was tracking to enter bear market territory again and test this year's low of 3,810.32 last month. (CNBC)

The 2-year Treasury yield on Monday hit its highest level since 2007, trading around 3.2%. At one point, the 2-year yield briefly inverted and went above its 10-year counterpart for the first time since April. A so-called yield curve inversion is seen as an indicator of a recession. The benchmark 10-year yield later popped to 3.26%. (CNBC)