Utility stocks soar to highest levels in a year as investors rush to safe havens 

The S&P 500 Utilities sector closed at its highest level in a year as investors sought shelter during Tuesday's market rout.

Utilities closed at 283.61, their highest close since December 2017.

On a 52-week intraday high basis, Utilities are the only positive S&P 500 sector, rising 0.6 percent from its most recent highs. Six of the 11 S&P 500 sectors are in correction from their most recent highs.

Investors favor utilities in times of tumult for their larger-than-average dividend yields and steady revenues. Investors right now are worrying about the flattening of the so-called yield curve, which could be signaling a slowdown in the economy.