All three indices suffered significant hits this week: the deepest loser, the S&P500, dipped -1.66 percent from last Friday; the NASDAQ was off -1.38 percent from a week ago, and the DJIA, while losing the least, still took a -.93 percent hit.
The Friday-to-Friday performance for the last nine weeks -from January to today- is weighted heavily to the negative side. The NASDAQ had only two positive weeks, while the DJIA and S&P500 had four weeks on the plus side.
The figure below shows the extent of the losses suffered each week. The median loss of the S&P500 is almost five times as large as the median gain. The DJIA has a better record: its median loss at -4.02 percent is still much larger than the 1.13 percent median gain.
This contrasts sharply with last years January-February results, where the median gain of each index was at least twice as large as the median loss.
DJIA - 2.51 percent
NASDAQ - 2.58 percent
S&P500 - 2.71 percent