Yesterday (Wednesday), Guar futures wiped out early losses and hit the 4% upper circuit, tracking the firm spot markets despite stringent measures taken by the regulator to curb volatility in its prices. The exchange has raised the long-side special cash margins to near about 60% from the earlier 40%, effective from Jan. 18. In the Jodhpur spot market guar seed rose 553 rupees to 10,538 rupees per 100 kg.