404 of 500 S&P 500 stocks rose on 29 October. Alphabet's $502 billion loss still sank the index.

404 of the S&P 500's 500 stocks rose on Thursday, 29 October. That is the most on any day in the site's S&P 500 record, which starts on 14 June. The index still closed down 0.37%, a loss of $264 billion, because one company lost $502 billion on its own.

One stock against the map

$GOOGL fell 12.6% on a day Reuters linked the market's decline to an Alphabet revenue miss. Leave Alphabet out and the other 499 stocks added $238 billion between them, a gain of 0.36%. The median S&P 500 stock rose 1.46%. The biggest gain in dollars, $AAPL's $74 billion, made up less than a sixth of Alphabet's loss. Even after the drop, Alphabet was still 4.9% of the index's closing value.

The previous breadth high was 402 risers on 20 October, a day the index gained 0.30%. Before Thursday, the most stocks to rise on a day the index fell was 372, on 17 July.

Alphabet's $502 billion is also the largest one-day loss for a single stock in the site's record. News outlets put the figure between $482 billion and $500 billion, depending on the share count used. The number here comes from the site's closing snapshot.

Communication services, in miniature

Alphabet's own sector shows the same split. Communication services fell 6.66% market-cap weighted, the worst sector on the map, yet 14 of its 19 stocks rose. $META gained 1.96%, $CMCSA 3.25% and $DIS 1.72%.

Across the whole index, only technology and consumer discretionary joined it in the red. Healthcare led, up 2.57%.