Dec 24 (Reuters) - U.S. equity funds saw big inflows in the week ended Dec. 22, supported by easing fears over the Omicron variant and strong earnings from some big companies such as Nike (NKE.N) and Micron Technology (MU.O). read more According to Refinitiv Lipper data, investors bought $27.55 billion worth of U.S. equity funds, and $22.96 billion in money market funds. Reuters Graphics Reuters Graphics Wall Street"s main indexes posted solid gains this week, with the S&P 500 marking a record high on Thursday. read more Reuters Graphics Reuters Graphics Meanwhile, U.S. bond funds attracted $1.5 billion in the week, compared with big outflows the previous week.