Stocks are getting crushed in their worst day since Brexit

Stocks traded lower on Tuesday, putting the market on track for its weakest two-day performance in at least six months.
This represents a pause from the recent rallies to all-time highs that some strategists have described as "parabolic."
A decline in healthcare stocks and concerns about rising Treasury yields were among the drivers of the sell-off.US stocks fell hard for a second straight day on Tuesday, pausing the recent rise that some strategists described as "parabolic." 
If Tuesday en