Wall Street fluctuated Monday as concerns about a weakening credit market curbed investors’ enthusiasm for reports of strong electronics sales over the holiday weekend.

The New York Federal Reserve, acknowledging “heightened pressures” in money markets that are expected to last through the rest of the year, said it plans to conduct a series of repurchase agreements aimed at boosting liquidity in the credit markets. The announcement from the New York Fed, which carries out monetary policy set by the U.S. Federal Reserve, essentially puts in writing many of the steps the Fed often takes at this time of year.

The Fed announced it would inject $8 billion to the banking system on Wednesday. The amount of money is somewhat larger than in past years at this time. [MORE]