Thursday’s S&P 500 index futures session extended the week’s volatility as sellers regained control, erasing much of Wednesday’s rebound.

Overnight, futures fluctuated in a narrow range before climbing to a high of 6,843 just ahead of the open. Early buying momentum quickly faded, giving way to renewed pressure as macro sentiment weakened.

The regular session opened near 6,828 and held steady through the first hour before a steady decline set in. Midday brought a brief recovery attempt toward 6,850, but resistance near that level triggered another leg lower into the afternoon.

By the closing bell, S&P 500 index futures settled at 6,747, down 77.75 handles or 1.14% and finishing well below the day’s midpoint. Volume remained elevated at 1.77 million contracts as traders unwound short-term long positions.

Despite intermittent bounces, the contract’s failure to hold above 6,800 reinforced near-term bearish sentiment, leaving the broader market down roughly 1.4% for the week.

Among the top components of the index, Berkshire Hathaway (NYSE: BRK.B) led as the biggest gainer. The conglomerate advanced $4.12, or 0.84%, to close at $493.15 for the day.

That performance was roughly 7× stronger than the broader market’s 1.14% decline.

The biggest loser ended up being NVIDIA (NASDAQ: NVDA). For the day, the chipmaker declined $7.13, or 3.65%, to close at $188.08.