Assertion: speculation | /r/CapableOf | play role
Facets:
value: always
type: DEGREE
value: in providing needed liquidity
type: TEMPORAL
Source sentences:
text: As Brett Scott, a former London broker, explains, while it is difficult to pin the blame on speculation, which has always played a role in providing needed liquidity to markets, the volatility of these commodities has attracted a significant number of technical traders who “speculate on market patterns formed by the actions of other traders.