U.S. equities traded in a wide range on Tuesday as U.S. oil prices seesawed and investors looked ahead to Fed Chair Janet Yellen’s testimony.

The small-cap/penny stock Russell 2000 index was lower by 1% midday.

WTI futures slipped 4.8 percent, or $1.45, to trade at $28.44 a barrel in choppy trading. Earlier, the International Energy Agency said that demand for oil will “ease back considerably” in 2016.

The S&P 500 dropped nearly 1 percent at the open, led lower by energy, before briefly turning positive.

The Nasdaq composite seesawed, opening down more than 1 percent, before reversing losses and gaining about 1 percent. The index sat lower in midday trading.