Here's how gold, stocks, the 'fear index' and more reacted to the new Clinton email probe

Markets got a jolt Friday afternoon when it was revealed that the Federal Bureau of Investigation is looking into new emails related to Hillary Clinton.

Stocks fell, gold and the so-called "fear index" jumped, while the U.S. dollar strengthened against the Mexican peso and Canadian dollar.

• U.S. stocks erased gains, with health care and financial stocks leading the way lower. The S&P 500 (^GSPC) briefly fell below the psychologically key 2,120 level that many traders view as a support preventing further declines.
  
  "Markets sold off, 12 (basis points) in S&P futures … it increases Trump's chances from very low to slightly higher,' said Ilya Feygin, senior strategist, WallachBeth Capital.
  
  

S&P 500 intraday performance Friday

Source: FactSet

• The iShares Nasdaq Biotechnology ETF (IBB) (IBB) traded above session lows but was still down 2 percent in afternoon trade. A Clinton victory is generally seen as negative for biotech stocks because of her comments against high drug prices.
  
  

• Gold futures for December delivery spiked to $1,284 an ounce in extended-hours trade to its highest since October 4. Gold had settled up $7.30 at $1,276.80 an ounce earlier in the afternoon.
  
  

• The VanEck Vectors Gold Miners ETF (GDX) (NYSE Arca: GDX) traded more than two-thirds of a percent higher, tracking for its first positive day in three.
  
  

• Treasury yields fell to session lows, with the 10-year Treasury yield (U.S.:US10Y) near 1.84 percent and the 2-year Treasury yield (U.S.:US2Y) below 0.86 percent.
  
  

• The CBOE Volatility Index (.VIX) (^VIX), considered the best gauge of fear in the market, jumped above 17 to its highest since October 13.
  
  

VIX intraday performance Friday

Source: FactSet

• The U.S. dollar climbed 1 percent against the Mexican peso , and hit its highest since March versus the Canadian dollar.
  
  

• But the greenback weakened against other major currencies to below 98.63 — the break-even level for the year. The dollar also erased gains for the week and was on pace to snap a three-week win streak.
  
  

• The euro traded around $1.098 and the yen was near 104.7 versus the dollar as of 2:53 p.m. ET.
  
  

U.S. dollar index year-to-date performance

— CNBC's Gina Francolla contributed to this report.

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