Explanation

Both Metallgesellschaft and Long-Term Capital Management (LTCM) experienced collapses that shared the common attribute of cash flow problems caused by large mark-to-market losses.

Metallgesellschaft (1993):

• Engaged in selling long-term oil futures contracts while hedging with short-term futures
• When oil prices fell, they faced massive margin calls on their short-term futures positions
• The mark-to-market losses on their hedging positions created severe cash flow problems
• Despite having a theoretically sound hedging strategy, the cash flow timing mismatch proved fatal

Long-Term Capital Management (1998):

• Used highly leveraged arbitrage strategies
• When Russian debt default triggered market volatility, their positions moved against them
• Suffered massive mark-to-market losses that required additional collateral
• The cash flow demands from margin calls exceeded their available capital

While both firms used leverage, the primary common attribute was the cash flow crisis resulting from mark-to-market losses that forced them to liquidate positions at unfavorable prices, creating a death spiral.

Option B (High leverage) was present in both cases but was not the primary cause of collapse - many leveraged firms survive if they can meet margin calls.

Option C (Fraud) is incorrect as neither collapse was primarily due to fraud.

Option D is incorrect as there are clear similarities between the two cases.