The gap between the money supply and the growth rate of gross domestic product (GDP), the Marshall K (Marshallian K), has recently turned negative for the first time since 2018, meaning that GDP is growing faster than the M2 account of the (US Federal) government. The gap stems from rapid economic growth that has depleted available funds. Such deficits could be a problem for the market at a time when excess liquidity is seen as underpinning the rise in assets ranging from Bitcoin to online celebrity stocks (meme stocks). The liquidity warning K fell below zero in 2010, when the S & P 500 retracted 16%. A similar decline in the value of K in 2018 heralded a sharp fall in the US stock market, which almost killed the bull market.