Ack! Your Stock is Correlated with Fannie??

Being almost 100% correlated with Fannie Mae is not surprising for Freddie Mac, but why do these other stocks have such a high correlation?

Fannie Mae

FNM chart

Stocks with positive correlation with FNM over the past 200 trading days

FRE    0.99
FNM chart

PLAB    0.97
FNM chart

GKK    0.97
FNM chart

NMSS    0.97
FNM chart

FICC    0.97
FNM chart