I very firmly because it because I'm a faggot Buddhist. I also have no idea what I've done to deserve so much bad karma recently but I figure if you react badly to bad karma it just creates more so have a positive response and do something productive and eventually your luck will change.
But isn't that, in a way, Karma?
Don't believe in luck, fate, or karma. I believe in reaping what you sew, and sometimes shit happens. Coincidence and random occurrence don't take sides.