A panel of Wall Street executives gathered at the U.S. Securities and Exchange Commission on Thursday to debate a rule designed to make sure investors get competitive prices.

Intel soared 22.8% for its best day since 1987 after Nvidia said it would buy $5 billion of the chipmaker’s stock. It’s part of a collaboration where the pair will develop products for data centers and personal computers. Nvidia climbed 3.5% and was by far the strongest force lifting the S&P 500 because it’s Wall Street’s most valuable company.

Most economists and Wall Street analysts are expecting the Fed to announce a quarter-point rate cut Wednesday, which would be its first of the year.

Many economists forecast they will show that officials expect three total reductions this year and at least two more next year, which would give a slowing but still steady economy a boost.