Best Buy Co., up 239 percent this year, saw its price- earnings ratio climb to 17.2 from 2 in January. The decade average was 15.9, before this year, data compiled by Bloomberg show. Earnings dropped 34 percent in the calendar year and are forecast to rise about 15 percent next year.

Micron Technology Inc., the largest U.S. maker of memory chips, rallied 239 percent, the third-most in the S&P 500. Price gains came even as the Boise, Idaho-based company disappointed analysts last quarter. Micron Technology is projected to return to a profit in the fiscal year ending in August.

Netflix Inc., the world’s largest video-subscription company, led the S&P 500. The Los Gatos, California-based company jumped 297 percent as earnings surged more than analysts forecast.

Market Value

The S&P 500’s gain this year created more stock market value in the U.S. than any year on record, according to data since 1990 compiled by Bloomberg. While the index advanced about 2 percentage points more in 1997, capitalization expanded by about $1.8 trillion less. The 34 percent rise in 1995 caused a $1.24 trillion increase in value.

Individuals are just starting to buy after watching the S&P 500 climb 172 percent to surpass the five-year advance that sent the index to a record in October 2007. Mutual funds that buy American equity took in about $21 billion in 2013, according to ICI data, while ETFs received $141 billion, Bloomberg data show. Bond funds had $67 billion taken out.

The preference for equities is a shift from the last four years, when about $260 billion was withdrawn from stocks and more than $1 trillion added to bonds.

Weekly Performance

The S&P 500 climbed 1.3 percent to 1,841.40 last week as data from durable goods to housing and employment exceeded economists’ forecasts.

“Markets have already moved, and markets lead investors,” Sam Wardwell, an investment strategist at Pioneer Investments in Boston, said in a Dec. 17 phone interview. His firm manages about $225 billion. “We started the year with people scared to death that a lot of things could go wrong. At the end of year, the economy has really done very well.”