QQQ has huge tech exposure, but it is not a 'tech fund' in the pure sense either. The fund's arcane weighting rules further distance it from anything close to plain vanilla large-cap or pure-play tech coverage.
During the time when Earth was forming and was in a molten state, heavy materials like iron and nickel sank to the center of the Earth's mass and lighter materials floated to the surface of the mass. The very center of what we call the core, is solid in the middle because of the increased pressure in that region.
According to standard planetary formation models, the gold, platinum, and tungsten that were present when Earth was born should have quickly bonded to iron and sunk into the planetâs core. Those precious metals are thousands of times more prevalent on the surface of Earth and in its mantle than the models predict. Willbold proposes that a colossal meteor shower about 4 billion years ago deposited the additional bling.