The overall US market? Caution is warranted.
I'm holding what, for me, is extremely high levels of cash (40% or so). What I own is extremely undervalued and I am prepared to buy more as they get cheaper.
Things you might want to look into owning:
Agency Mortgage Reits, AGNC is probably the best choice. Good during economic down-cycles and very solid yield.
GSL at around $2 and NM around $3 are extremely solid entry points.
RSO at below $4.5 is great
GKK below $2.5 if you can get it will be a gift.
OGXPY is a buy right now and i'd be grateful if I get to add lower
BAJFF(Baja Mining) is a buy right now and i'd be grateful if I get to add lower. I'd probably only have a 20%-of-full-position-size in this right now though, so you can back up the truck the other 80% if it drops back below $0.65. This stock will be $3.5+ by mid 2013 IMO. Fantastic risk/reward IMO.
SFI below $5 is where i'd start nibbling, if I can get any shares there.
ETC ETC ETC. Just gotta be very selective and keep dry powder available. I like to keep alot of my 'cash' in things like agency-reits which give a huge yield since I understand that business model and can gauge its inherent risks if the overall environment changes.
If you want to short something, to hedge parts of your portfolio being long, Ratobranco introduced me to HDGE -- It seems like a good safe choice for such a position.
-Fernando