From the second trading day of Thanksgiving week (November 20) to December 24, the Dow had the following large single day losses:.

November 20 → 551.8

December 4 → 799.36

December 7 → 558.72

December 24 → 653.17

Rounding to the nearest whole number: 552 + 799 = 1351

Consider the dates (December 7 → 12/7) and (December 24 → 12/24) of the 558 and 653 point drops.

127 + 1224 = 1351

In 2018 the major indexes had their biggest loss for a Thanksgiving week since 2011.

• The largest point loss during Thanksgiving week was 552 points on November 20 (20/11).
• The 552 point drop was followed by the 799 point drop on December 4 (see: List of largest daily changes).
• The last trading day of Thanksgiving week was November 23 (11/23).

552 + 799 = 1351

1351 − 1123 = 228

The number-prime relationship [264, 1693] is significant to each large single day point loss in 2018.  From February 28 (2/28) to the first trading day (November 19) of Thanksgiving week is 264 days:

• The 228th prime number is 1439.
• The 1439th prime number is 12007.

The 799 point drop was followed by the 558.72 point drop on December 7 (12/7).

• February 28 (2/28) can also be written 28/2.
• December 7 is 282 days after 28/2.

The largest point drop in the Dow's history was 1175 points on February 5, 2018.

Adding 264 to 1175 equals 1439.

1175 + 264 = 1439

Recall:

• November 23, 2018 is the 55th anniversary of Dr. Who.  It is also 55 days from the 10th anniversary of the 2008 market crash.
• 55 is the 10th Fibonacci number.
• (11×23) = 253
• September 10 (9/10) is the 253rd day of the year.
• From the broadcast of Season 9 episode 10 of Doctor Who to November 23, 2018 is 1098 days.

1098 + 253 = 1351

December 7 is 88 days after 9/10.

Adding 88 to 1351 equals 1439:

1351 + 88 = 1439

The 558.72 point drop on December 7 (12/7) was followed by the 653.17 point drop on December 24 (12/24).

Recall: (127) + (1224) = 1351

Ignoring the decimal: 558 + 653 = 1211

Adding 228 to 1211 equals 1439 (the 228th prime number): 

(558 + 653) + 228 = 1439

(1211) + 228 = 1439