ok going to move on from this topic after this but:
1) borrowing =!= shorting. Sometimes borrows are for liquidity, or yield farming, or collateral, etc.
2) obviously Alameda has automated systems to monitor and manage risk, it doesn't just passively say 'oops liquidated!'
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collateralization ratios getting tight, must be confident in your systems. sending over the right collateral will likely move you out of a position and move the market.
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why would it move the market? what if it was sitting around somewhere in case it was needed?
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cause you’re a quant, you are not going to borrow something and pay interest unless can generate a better return. right just sitting in binance and bittrex that you pulled liquidity from to repay and market moved.
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OTOH -- it's *extremely* valuable to have spare capital:
1) if you don't you'll get blown out to moves
2) free to use for new things that come up
generally you almost always want a bunch
agreed but I would speculate that your spare capital is not sitting idle but on order books MM. when squeezed offside either have to take the market to get collateral hedged or pull liquidity allowing price to move easier.
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